There is a lot of manga that has this thematic and often realistic depiction of mental disorders.
(I suck at formatting so I can't really give them names)
https://mangadex.org/title/12033/shoujo-shuumatsu-ryokou - two girls stuck in a post-apocalyptic scenario, with nothing but themselves to keep them company.
https://mangadex.org/title/15976/shimanami-tasogare - dude is outed and shunned for being gay; finds a group of LGBT peeps that can help him grow out of his shell.
https://mangadex.org/title/19652/the-private-report-on-my-lesbian-experience-with-loneliness - an actual neet improves her life by fostering up the strength to get out the path of self-destruction.
https://mangadex.org/title/9589/kasane - (my personal favorite) a woman is born with a hideous face but due to a lip-stick and a kiss she is able to live her dream as an actress.
https://mangadex.org/title/2334/oyasumi-punpun - (I haven't read it yet but I have heard it is amazing)
https://mangadex.org/title/1101/monster - (another favorite of mine; I would rather watch the anime but either one is good) doctor saves a boys life but later that choice comes back to haunt him.
Even though you don't want to read it, I urge you to open yourself to new experiences. It's really good.
https://mangadex.org/title/6925/himegoto-juukyuusai-no-seifuku - (man, i have a lot of favorites lol) 3 people suffer with sexual and gender identity; putting each other through quite a lot of painful situations to find a solution to their pain.
