I thought the controls in Black Flag were fiddly in general. I kept jumping off ledges, falling off buildings or jumping in the complete opposite direction most of the time. The combat mainly involved me constantly getting my ass handed due to bouncing across the area like a monkey.
Maybe I just suck at games these days.
The worst part is when I'm taking over a ship, and it requires me to burn their flag. At times Edward just refuses to climb the last bit of pole that get me to the flag, in which case I accidentally end up pressing A for jump (everytime) which cause him to just jump off the freaking mast (?) and fall to his death (and desynch) - resulting in the whole thing being a massive waste of time