I agree mw2 has its problems, oma is one of them, but i find it far more satisfying to kill some dude OMA'n from the roof in terminal, then getting a blackbird in black ops. As far as the snipers go, the ones that can actually kill you are pretty few and far between. I see them all the time, and most of them just post up in one spot until they die, then they run back.
As far as camping goes though, there is pretty much nothing worse then bloops camping, i have never played a fps where people honestly sit in a corner all game, maybe a few different corners, but still always corners. That never happens in mw2 that ive seen, it is by the most annoying camping tactic ive ever seen, ill take a oma'r in my mw2 game over a corner camper in my bloops game any day.
and somehow, comparing the last couple months ive spent playing mw2 to the few months after release i played bloops, there was always more chopper gunner types in bloops games then my mw2 games. Everyone in mw2 i see does pred/harrier/pavelow. I personally use uav/counter/emergency and throw it too wherever the enemy is and shoot them when they try to get the boxes.
Also mw2 is way prettier then bloops and plays alot smoother to me, also better maps, better weapons.