HOW THE FUCK AM I SUPPOSED TO KILL THIS MOTHERFUCKER

I cant kill this dumb motherfucking wortless piece of shit i just cant, i hate this useless asshole i have played for three fucking hours and i cant kill him i have watched four fucking videos and this asshole just refuses to make my life easier and die, i didnt even struggled that much withe lady butterfly or genchihiro but this asshole just hates me and want me to feel actual irl pain, i am going insane just by watching his miserable existance, please help me