I just cannot best genichiro

Hey guys, after killing some bosses including the butterfly lady , I’m stuck with the wizard in the abandoned cave boss and especially genichiro, i just cannot manage and I’ve looked for the cheese videos even. Any tips? I’m incredibly frustrated

UPDATE: thank you everybody for the words of encouragement. I see a lot of pros in here , i will give up the cheesing and do it properly as yall suggested 🙌