I actually didn't hate Duke Nukem Forever, though I was dissapointed in it. Then again, all of the early 2011 shooters disappointed me. (Crysis 2, Brink, KZ3, Bulletstorm, Red Faction: Armageddon, etc.)
The worst game of 2011 for me is... Mindjack. OH GOD, MINDJACK! Trust me, Yahtzee was...