Uncharted 3.
It was the worst best-looking game I played this gen. Awful controls in every respect, lame dialog/story/characters, and a very uninspired premise. It was technologically the greatest console game ever made, but after playing it for a while I wondered why Naughty Dog studios don't just make animated movies instead. Every bit of the actual gameplay was an afterthought, taking away from the only things that were done well, the cut scenes.
A close second place is God of War 3. It was the same, repetitive nonsense that had me quitting just a couple hours into it. The graphics were incredible, but that's all it had going for it. This comes from someone that thoroughly enjoyed GoW and GoW2 quite a bit.