I think many people, 'mental health problems' or not, probably feel that there's a world out there that's being missed out on, and even if one were to do all the things that one would expect to alleviate that feeling, one would then still perhaps feel excluded from something better.
That's not to recommend not bothering with it, no, not at all. Perhaps it would help to get clearer on one or two things out there in the world that you want to do so that you have some reason to focus on that rather than on self-destructive miserable loop.