Did you read red mansion yet?
I've seen threads on TikTok for this topic before, so maybe check there. MadK is a fun one. You get to witness the ML slowly become a toxic individual. https://www.mangago.zone/read-manga/madk/
A little bit psycho is acc scary toxic bottom but it hasn't been updated in eons. I second Red Mansion
I've seen all #－.－) btw madk is my favourite and I miss the updates ╥﹏╥
Toxic x toxic because I'm tired of innocents getting into toxic relationships or psycho bottoms because I wanna see some crazy bastards now (づ￣ ³￣)づ