https://www.mangago.zone/read-manga/cocoon_of_the_heart/
So this one I love bc he doesn't exactly suffer and changes completely like asshole to green flag, he actually changes and fix his behavior while still having his personality
https://www.mangago.zone/read-manga/crossing_the_line_1/
Only the last one, its very funny btw
Abt the first one, i read "Cocoon of the heart" years ago and can't really remember all the details but their story is rlly good, it's an enemies to lovers of two guys who suffered the lost of their love ones in the same accident, the ML blames MC's loved one and redirects his rage to him, they both have a lot of character development (is kinda tragic and touches a lot of issues abt mental illness)
need me BLs that have ACTUAL character development where the uke/seme experience REAL suffering!!!!!! and where their shitty behaviors taken seriously cause I'm SICK of authors brushing them off!!!!!