That's what they all say. And play private servers if you don't want to play with "hackers", with good admins there's barely any at all. pc players are just ahead of console gamers. Oh and did I mention mouse is more precise?
The main balance problem is the variety in the guns. Most of them are the same. 3 default full auto fire rates (one of which is only used on one gun, by default). MW2 guns were balanced. And that game was plenty chaotic. But here, Spectre and Ak74u>all other smgs. As the stats of the others are the same, but those two have a bigger mag size. And the assault rifles, they're the same too. The commando, Ak 47 and the galil fire at the same rate, have the same damage and they have similar recoil. What's the point in using the AK 47, when the commando bounces less? And the FAMAS. Why use any of the SMGs over something that fires at the same rate and does more damage? It out hip fires SMGs. And the ADS don't matter much outside it.
Another thing is, you don't have much initiative to prestige. Mostly cosmetic things. And you lose all your money, and start of from scratch. Thats why a lot of people say the game gets boring faster.
That's just my two cents.