I’m stumped

I’ve been in this Reddit before asking for help and I’m here one last time hopefully 4 whole days, 50+ attempts, Genichiro seems just unbeatable, the furthest I’ve gotten is his third phase before he smites me with lightning so fast I can barely redirect it. I’ve tried everything, even cheese tactics I’ve heard online but nothing is working, some of his attack combos are so fast and so long I don’t even have the poise to parry all of the attacks or dodge away, he’s also long as hell so I can’t just make it a battle of attrition, aggressive playstyle, passive playstyle, nothing works. I really wanna experience this game especially after the hours I’ve dedicated to it So if anyone has anything to say on how to somehow beat this guy please do, hell I’ll take glitches at this point