Niggross
So the next main antagonist is Louise. Since Louise didn't know Earth's common sense, she won't understand Michael. And since Michael is already insane, he will never try to listen. Resulting in them killing each other. The only way I can see this whole situation turning around is when Tiffania decided to leave Michael. or maybe it will worsen Michael's insanity if Tiffania is killed which would be more likely because of the author's sadistic urges to torment the MC.