37 here, and that is
exactly how I feel. I'm hardly an optimist about how a lot of things in the world are going, but world-weary cynicism (the world is shit, it'll never change, everyone is corrupt, etc) grates on me as cloying and juvenile. I always end up thinking it says more about the person than the world itself.
These days, I usually find myself starting to argue and push back against that, and occasionally I do end up coming down to "So the world is shit, you're not even going to try to do anything about it, what in life do you have to be proud of about yourself at this point?"
I feel better for not putting up with it, but it has led to some tense arguments with extended family, friends, hairdressers (haha, seriously).