The Hatchet Man glitch - instant death -FRAMERATE IS GLITCHED IN DR1-

Is this because I play on 120hz, being 120fps?Feel it might be sped up. Can't even run away, definitely not like this on 360.Update: I attempted this boss on 30 fps instead of 120.See the difference here.30FPS - https://clips.twitch.tv/mitchedits2/AttractiveBisonKappaWealth 120FPS - https://clips.twitch.tv/mitchedits2/GlamorousFoxOMGScoots Differences:30 FPS Boss movement speed much slower. Only half a health point taken from special attack. Sometimes takes one point, it seems to be random.120FPS Boss movement speed is so fast that you can't start the boss. Full 6 health point loss.Must be why I've been finding this game profoundly hard compared to how I remembered it.