Actually Pokemon could get an 8 out of 10 and still be overrated.
I'm sorry, did you just say "Back in my day" to me? Did you not notice where my age says 28? Are you aware that means I was a kid before the Nintendo Entertainment System (the 8-bit system) existed? That I grew up on the Atari 2600? So much for your rant about "high-res graphics." The graphics aren't even the reason the original Pokemon games are overrated. Let me get into this and school you, SON, since you're probably ten years younger than me if not more.
We had to work to complete our Pokedex, a feat I am yet to acomplish after at least ten years.
You had to work to complete it? HOW? In Pokemon Red and Blue, EVERY Pokemon is available in some form between the two games. Compare that to Diamond and Pearl, where some Pokemon DON'T EVEN EXIST in those games. For example, you'll never find a Tropius or a Tangela in them, no matter how hard you look. You'll never find a Bulbasaur, ever. The only way to get them? Play one of the Game Boy Advance games and use Pal Park to transfer them over. So in order to get every Pokemon in Diamond and Pearl, you have to play, at a MINIMUM, FOUR other Pokemon games. And I don't mean "Play for ten minutes to get one Pokemon," I mean you have to play FOUR OTHER GAMES for at least 50 hours to get every Pokemon in Diamond and Pearl.
And guess what? There's no Rare Candy cheat to get 255 Rare Candies like there was in the original Red and Blue. So oops guess I destroyed that statement since all you have to do is surf up the side of Cinnibar Island and your Pokedex is basically done. REAL HARD.
We didn't have crzy bad guys trying to reform the world, Team Rocket was smart enough to know the best the could do was (almost) get rich.
Then what was the purpose of Mewtwo, who was created by Team Rocket? Also did you somehow miss all the Grunts talking about how Team Rocket was trying to achieve world domination through brute force? I guess you did.
Now, let's get to why the original games are overrated.
First, Special Attack and Special Defense were only one stat: Special. What this meant was that it didn't allow for variation between Pokemon...in other words, a Pokemon with a low Special not only couldn't utilize Special attacks well, it couldn't TAKE Special attacks either. The split in Generation II allowed for some Pokemon (such as Chansey) to have a massive Special Defense stat, but hardly any Special Attack. This also gave Fighting types a chance, since almost all Fighting types in the original games had horrible Special, giving them horrible defense against Special type attacks.
Second. Psychics were gods. This destroyed any challenge in the game. The only things strong against Psychic types are Ghosts and Bugs. The problem is, in Red and Blue there's only three Ghost Pokemon: Gastly, Haunter, Gengar. They're all three part Poison, so guess what? Psychic is super effective against them, meaning they get KOd immediately...not to mention that there's only ONE Ghost type move that deals damage, Lick. And Lick is too weak to do anything.
As for bugs? Most Bug types were part Poison, or so weak that it was pointless to use them. There was only ONE Bug type move that did damage...Pin Missile. Guess who learned it? Well, Beedrill...who was part POISON and thus got KOd by Psychics in one hit, and there was Jolteon, who wasn't even a Bug type. Pin Missile also wasn't that strong, by the way...a base attack power of 14. Meaning it did crap damage. It wasn't until Generation II that Dark and Steel types were introduced to make Psychics balanced, which included strong Dark type moves, more Ghost type moves (like Shadow Ball), and stronger Bug moves (like Megahorn).
Third. Dual types. Find me a single Grass-type in the original games that isn't a dual type. Tangela's the only one, and guess what? It barely learns any Grass type moves, not to mention you get it so late in the game. As already mentioned, there were no pure Ghost types in the original games, meaning Ghosts got destroyed by Psychics. Since there weren't any Abilities, Koffing and Weezing and Gastly didn't know Levitate...meaning Ground moves could hit them for super effective damage.
Fourth. Useless TMs. In the original game, guess what TM you get for beating Brock? Bide. Bide is such a worthless move, and to get a TM for it was ridiculous...especially since Brock is a Rock type trainer, for him to give you a Normal TM move? In the new games, guess what TM Brock gives you? Rock Tomb, a Rock type move that's actually useful. Plenty of useless TMs in Generation I, like Horn Drill and Fissure (one hit KO moves suck), and a TM for Softboiled, a move which only THREE Pokemon can learn...two if you don't count Mew.
My dislike for the original two games isn't based on "high-res graphics" or "stereo sound" or any of that mess. It's based on the fact that the Pokemon were unbalanced, there wasn't enough variation between them, making battling very difficult. If you had a team of nothing but six Alakazams in the original games, you would destroy everything. Nothing could stop you. In the new games, if you have a team of six Alakazams, you'd get destroyed by Steel and Dark types.
So again, the reason the original Pokemon games are overrated is because of horrible balance issues. It hasn't aged well. They were fun FOR THE TIME but they haven't held up. The Gold/Silver/Crystal games show their age, but they were the first to make the system workable, and thus while not amazing, are quite good, and still very fun and playable. The ones for GBA and beyond are simply fantastic...a good challenge with deep battling strategies, something the originals sorely, sorely lack.