I'll talk about the story first. To get the biggest point out of the way: it's too flawed to have potential. That is, the premise is implausible and the story contains several massive plot holes. I might jump around a bit, so bear with me.
The boy genius character might work for younger audiences, but he's too smart regardless. The second most advanced borg (I'll get to the use of this word in a moment, but for now I'll use it) ever built shouldn't need improvements, especially not those designed and made by a child in an impossibly short amount of time. And this boy not only builds borgs, but he completely invented his own martial arts style? That's too much for anyone to do, even a genius.
As for borgs, before I continue. I assume that's derived from cyborg. Thing is, these aren't cyborgs. They're androids (well, male types are androids, female types are the lesser-used term gynoid, but android is usually used for all; I will differentiate if I come to it though). Also, doesn't "Borg" usually refer to the Star Trek race?
Getting more in depth about the robots as a whole. It sounds like they're pretty much incorporated into two aspects of life: recreational fighting and major government. Thing is, there doesn't seem to be much of a difference in technology between the two. Sure, the government robots are more advanced, but not by much. It seems that amateur builds are too expensive and advanced for most people to make. Fluid motion is one thing. I'd expect them to be rough, requiring almost total human input. But bombs, even exact decoys? Flying blades? Energy blasts? This is stuff that should be highly regulated, and I mean highly. It's not what a kid should be able to access. And where would a kid get the money and materials to build robots? Even in the future, they're not going to be cheap or easy to make.
Speaking of, an absolutely massive problem is Swift Lee and Yekun. Okay, Yekun is not only a government robot, but THE most advanced robot ever built? And Swift Lee just took him from his father's workshop? No. The most advanced government robot ever built couldn't just disappear like that. There would be a huge search, I mean whole city and beyond. It certainly wouldn't get to the point where Yekun could fight in a major tournament.
And about this tournament, it's supposedly almost as big as the Olympics? Then sixteen competitors is way too small. Not only that, but anyone is allowed to enter? For such a small number, you'd think it would be reserved for the top fighters around the world. It would be a large tournament with hundreds, if not thousands of international entrants, culminating in the sixteen top fighters in Red Web City. Also, doesn't it seem a bit...small? For a city that seems to have a large robot industry AND an annual tournament, you'd think it would have much more than one and a half million residents. Unless its economic power is huge, it's not much worth taking over.
Okay, so other things with the story. I doubt that a spy would tell a kid all about its missions. If there's one thing about kids, it's that they talk. I mean, do they talk, and with a barely functioning filter. Hell, many adults don't know when to stop. Regardless, telling anyone about their organization, their missions, who they are, what they do...that's risky. And by risky I mean they would never be allowed to do that, that's dangerous, it could compromise everything. They also would never allow civilians to accompany them on missions. Again, too risky. And I know they're advanced, but having only seven (six, at the last is a prototype) spy robots isn't that much, especially when at least half of them are in that one city. Why not have a mass-produced model, so it could be more widespread?
Oh yeah. More technology things. It's not being used realistically. A garage is enough to be safe? I mean, I can see things like touch screen and voice command and even holograms working because it's the future, but overall the technology doesn't work as it should.
For more specific things, there's a part where Ezela suddenly remembers upgrades that she's received. This shouldn't be it. She's a robot, and an advanced one at that. She should be able to remember these. Not only that, but these upgrades come from nowhere. It's almost a deus ex machina. That is, it's a sudden solution to an unsolvable problem. Actually, given that these were more last resorts, I would call them that. It's not satisfying, and it feels like a cheap way to get someone out of trouble.
Ah, I swear there were other things but I'll move on and just post again if I remember them.
So, onto writing style. It needs a lot of work. You rely on telling, not showing, which is one of the biggest things that you Do Not Do as a writer. Outright telling the reader who people are or what is happening comes off as an infodump, and infodumps are bad (except in certain occasions, but this is not one). It's a very common mistake that new writers make, but it's one that must be broken to improve style. It's not exciting to suddenly know all about something. Raise suspense and intrigue by slowly revealing information. And I don't mean spread the infodump out. I mean, show what's happening. Don't say your character is nervous. Say that your character's shaking, that their palms are sweaty, their heart racing. Don't tell us who the bad guy is, show us what they're doing and how it affects the city. Your readers will figure it out, and your writing will be much better for it.
There's also the problem of flow. You haven't paced it out well, making it awkward to read. Fast paced scenes are drawn out while scenes that are slow or could serve as character development are over within a few sentences. You also break from the actual story by going off on tangents, many of these being infodumps. Don't do that. One key to good writing is maintaining a good pace. The reader should be immersed in the story, and ruining the pace, especially with tangents, will jerk them out of it. That's another reason you need to show, not tell. I can't stress that enough. Actions scenes also feel disjointed. They're written more like a screenplay instead of a narrative.
For your story, I think it would be best if you stay within the point of view of the main character of the chapter. Don't reveal anything they don't know, and don't switch to the point of view of another character. A character might not notice something, or have extraordinary attention to detail. They might do one thing and not do another. This will affect what the reader knows. Do it right, and all the pieces will fall into place for the reader.
And now, for the biggest issue I wish to discuss:
There's also very, very little character development. There's nothing to these characters beyond their respective cliches: the child prodigy, the bully, the insane terrorist. Okay, so what else is there to Jumper the boy genius? He's smart, he builds robots. That's it. The bully? He's mean, he steals robots. There's nothing there to make them relate to the reader. We love characters we can understand, pick apart, study, characters for whom we feel sympathy and joy and anger. Here, there's nothing. It's devoid of emotion, too hollow to elicit any feeling from me. As I mentioned before, you devote very little attention to scenes which should be used for character development. The closest you get is the scene with the book. However, it feels incredibly out of place. There's no connection with any other scene, and it's never mentioned again. As for developing character, it is not effective. I learned very little and the characters remained distant.
RESOURCES FOR IMPROVEMENTI'm going to post a few links to resources which you can study, to get started. DON'T get discouraged by one failed project, or a dozen failed projects, or even a hundred failed projects. We all have to start somewhere. I know I've written my fair share of garbage, and then some. I'd be downright embarrassed to post any of my earlier work, because I've improved. And you will too, as long as you strive for improvement. Accepting critique is one of the most important things you can do as a writer. Without critique and without a drive to improve, all you can do is remain stagnant. (It's also why I prefer critique to compliments.) I suggest trying some short exercises. As you improve and expand your abilities, you can try longer and longer projects. I'm not even comfortable with novels yet, as I feel that I have a way to go before I'm ready to write something so long. There's no shortcut to good writing. It took me years to get to this point, and that was with regular study and practice (though I'll admit, I haven't done much recently, and that does nothing but harm me), so you need to stick with it.
This is specifically fight scenes.Here's a whole collection of topics.Another blog you can browse through for more varied topics.