Well not very traumatized but still traumatized:
A mail from my dead lover
https://www.mangago.zone/read-manga/a_mail_from_my_dead_lover/
I don't know if it's very traumatized but...
https://www.mangago.zone/read-manga/good_day_to_go_crazy/
https://www.mangago.zone/read-manga/kiraide_isasete/
https://www.mangago.zone/read-manga/iberiko_buta_to_koi_to_tsubaki/ second couple
https://www.mangago.zone/read-manga/boy_meets_maria/
https://www.mangago.zone/read-manga/doushitemo_furetakunai/
https://www.mangago.zone/read-manga/rouge_katsura_komachi/
https://www.mangago.zone/read-manga/therapy_game/
https://www.mangago.zone/read-manga/mods/ and this one
Isekai / Transmigration to ABO world
https://www.mangago.zone/read-manga/save_my_love/
does anybody know any good bls with a very traumatized mc (very traumatized) and the ml is a green flag who helps him