Fiction – adult exploration of brokenness/loneliness/shame w/o cynicism/preaching/misery porn

Looking for a piece of fiction that explores shame, failure, feeling broken beyond repair, isolation, running away from oneself. Optionally add history of mental health or addiction into the mix, but not as the core theme. Not in a flashy grotesque way, but in a dull everyday “running away from oneself / not wanting to exist” way. Looking for a book that simply empathizes with the character without turning to cynicism, misery porn, or preaching/self-help.

To calibrate and help others with similar requests, I loved:
– Marquez (all of it, but esp. the Colonel's arc after he returned home)
– Dovlatov (esp. the biographical A Prison Camp Guard's Story, also later stories about him being a failure, losing his marriage, drinking)
– Tolstoy when he describes human condition instead of preaching
– I had a Vonnegut/Bukowski/Salinger/Remarque stage in early 20s, and while I still love a good coming of age story, that's not what I am looking for right now, I think

On a lighter side
– unexpectedly, recently found some parts of the King's Dark Tower series quite fitting (the first book that reads more like a hazy dream sequence, Eddie's codependency and drug addiction arc, father Callahan’s arc of alcohol addiction, failed attempts at redemption, and running away from himself)
– the psalm for the wild built was nice
– A Man Called Ove is also quite sweet
– love sci-fi and Ted Chaing in general, his “Anxiety is the Dizziness of Freedom” is quite fitting

For others who might come along this thread later, if it resonates with you, I recommend
– games: Disco Elysium (just wow, the saddest and most brilliant game I ever played)
– movies: Evangelion (maybe I am just projecting, but I think it is in many ways about exactly that), Flowers (Netflix, first season)
– non-fiction: Alice Miller, John Bradshow
– I am not a religious person, but I found some Christian authors like CS Lewis in “A grief observed” quite relatable

Did not like
– Dostoevsky – too preachy, too loud, too theatrical, too self-absorbed to my liking
– new sincerity (eg The Corrections) – too much misery porn
– existentialists (Kierkegaard, Camus) – feelings are relatable, but all the "answers" suggested seem off and regressive, idk, and Camus is a jerk
– Midnight Library – was recommended, finished, but just not a very good book.

Context: 30M, dealing with some stuff, but getting help (therapy/meds), always found it easier/safer to emotionally connect with fiction then real people, having authors find words for feelings I could quite tell apart. I am probably looking for a book to mirror my feelings back at me (instead of talking to real people), which is not great, but what the hell, isn't that the whole reason why art exists?

Thanks all.