Most of Sasuke's fights in part 2 if we're being real. Against Deidara there should have been no way he should have been able to summon Manda, put him in a Sharingan genjutsu, and then reverse summon while being in an explosion if he was "out of chakra". It was bullshit.
Against Bee, they all got stomped...Sasuke died two times in that fight, but somehow both Jugo and Karin have these amazing healing abilities. I could understand Karin - but Jugo? He never even used it again.
Against Itachi...Itachi won in the end. It doesn't matter how you look at it. They were both exhausted, but Itachi had his Susano'o up and was virtually untouchable...he could have killed Sasuke in that final moment, but we find out he never wanted to do that from the beginning (due to the plot, obviously).
The fight against Danzo was really the only one where Sasuke wasn't saved by the plot.