Series where the Main Character/Hero is kind of Unhinged

I don't want a MC that is evil or that has some CRAZY super powered evil side or anything like that. I just want something where the Protagonist, despite being clearly not right in the head, still does the right thing.

Also I don't want any series where the Main Character is "crazy" because they push themselves way too hard to help their friends(basically the classic shonen protag archetype). I like to call that "normal" crazy, sure only someone crazy would do that stuff but they're completely normal 99% of the time and even their motivations in those moments are also fairly reasonable.