This is actually very deep. People with depression and anxiety often see old patterns in things that are not related, completely misinterpreting the reality. I am amazed that he realises that because it is a big step to overcome it.
Spoiler!
Underrated manhwas I recommend:
1. The Foul
2. No Moral (novel as well)
3. Circumstances of fallen lord (novel&manhwa)
4. I'll raise you well in this life
5. One roof two strangers