Don't read this shit. It's tolerable if the MC kills people according to their own sense of justice.
But this dude straight up does guro torture shit on some priestess chick.
I can't think of any situation where a writer can possibly make that work out as something justifiable, or something the reader will accept from their protagonist. Fuck this manga, fuck the MC, and fuck the douchebag of a writer who made this crap.