I need something that'd ruin my life

https://www.mangago.zone/read-manga/141108/

Sure
https://www.mangago.zone/read-manga/save_me/

https://www.mangago.zone/read-manga/koko_wa_ima_kara_rinri_desu/

https://www.mangago.zone/read-manga/suicide_island/

https://www.mangago.zone/read-manga/the_horizon/

Believe me. This one is a must read if you really looking for depressing shit
https://www.mangago.zone/read-manga/efforts_never_betray/

Pretty sure this one doesn’t have romance, or very little at least
- https://www.mangago.zone/read-manga/to_you_the_immortal/