I get it i get why everyone hates Erlang

I have 55 hours and haven’t finished the game mainly because i wanted to explore as much as possible. Anyway i finally got to erlang and since i wanted the secret ending i decided to fight erlang before finishing the final boss fight. It has been days and i am baby raging like no other game. Ive gotten him to within a small portion of his health but can never finish the fight he has so many destructive attacks that two or even one tap you. Genuinely no boss in any other game has made me baby rage like this. Yellow wind sage was the only other guy who took nearly this long but even he is nothing compared. Ive played half of sekiro and bits of elden ring but Erlang is truly my worst nightmare. God i love this game.