It's fun hating on CoD.
I got it and have been playing it since released. (Well, a couple hours after release, had exams and didn't want to be THAT guy who passes that stuff off just to play.)
While the game does have performance issues, I can run the game on really low settings. For one thing, graphics aren't everything, and for another thing, they'll probably iron it out eventually like eeveerry other major game launch.
The game is actually really, really fun to play, especially with a group of friends. The zombies mode is really fun, but is extremely difficult. Campaign is pretty cool and it actually has some new neat features. Multiplayer is really fun.
Basically, if you can run the game, it's pretty fun. If you can't, then hate is justified until they fix it.
(unless you can play it and actually don't like it, then, that's personal.)