Fallout: New Vegas. A shitty plot, shitty graphics, shitty animations, shitty gunplay, shitty dialogue... is there anything good about this game? It's practically a chore to play.
Counter Strike. I love every single other FPS made by Valve, but this one? It's just a complete mess. Broken hit detection, unbalanced weapons, endless cheap deaths, ridiculous flashbangs and no respawning. Add to that the terrible community and you've got one of the worst multiplayer FPS games of all time, in steady competition with Call of Duty.
Call of Duty. After playing Battlefield 3 for one round, I sold MW3 to my friend. There's nothing to do but run around in the boxed in, dull environments, spraying around until someone gets hit with a stray bullet. It's like we're lab rats, with Activision testing how long we'll continue buying their games even though every single one is the same dull mess.