There is an obvious tell for the one counter you need to proceed, he basically taunts you. Then you need to just get close and counter.
I never realized that I was supposed to engage his taunt during that fight. I always just kept my distance until he proceeded with his normal pattern. He has other counter moves as well so those are the ones I used. Felt a bit silly watching gameplay and seeing people challenge his taunt.
Already beat the game but I might do the final fight again just for fun.
Already beat the game but I might do the final fight again just for fun.