Okaay so u might've asked the wrong person because i am fond of some toxic angst but I'll try my best:
https://www.mangago.zone/read-manga/iki_dekinai_no_wa_kimi_no_sei/ (shounen ai, musician lovers very cute and healthy relationship)
https://www.mangago.zone/read-manga/off_the_plate/ (I think the writing is amazing also I like food competitions what can I say, pretty angsty)
https://www.mangago.zone/read-manga/the_last_step_on_the_way/ (angsty hurt/comfort)
https://www.mangago.zone/read-manga/nerd_project/ (I forgive everything bcuz of the unbelievable tension)
https://www.mangago.zone/read-manga/fangs/ (very cute also grapples some deep themes bcuz immortality so angsty)
https://www.mangago.zone/read-manga/exclusive_no_love_zone/ (interesting omegaverse discourse I think most non toxic omgvrse)
https://www.mangago.zone/read-manga/love_for_sale_1/ (ppl pleaser × workaholic, ok this may be iffy but they get there)
Sorry for the subpar descriptors lol I'm half asleep
Random ass nobodies with no legitimate reason to hold a grudge coming in and starting trouble, rapists repeatedly attacking their victims until they apparently "want" it, people keeping dumb ass irrelevant secrets from their partner to not "burden" them which ends up causing more problems and ruining relationships that were actually good... Like i get it, conflicts that need resolving helps push the narrative forward or whatever, but the stuff happening in some of these titles right now is just utter bullshit