Holy crap I almost threw away AssCBro in disgust on my first fight with a Borgia Captain. I only had to fight him ten goddamn times before I could kill him. He's surrounded by ten guys and you have to swipe him about twenty times. Christ. Apparently you were supposed to throw him into a fence or something which I didn't know until after the fact and it said mission failed 'cause I guess I wasn't reading the screen when the mission initiated.
But once I got past that the game got playable again