If Warhawk wasn't any good I don't think there would be close to 800k messages on the playstation forums. Next closest is GTA4 wit about 500K. I know its been out since ps3 dropped but if it was wack it would've died a long time ago - especially since its online only.
Also, if you step your game up you wouldn't have to worry about team killers, lol.
My personal opinion of course