Being depressed about the 'world' can occur from simply: too close inspection of some of 'its' illusions. But your mind isn't working half-bad, I'd opine.
(And your chosen field appears to contain about as much daily BS as my simple mind could never imagine, unassisted)
Hmmm?
Yes - cool out. Ignore lots of stuff, including 'us' :-\ufffd
(Recall too - takes some acclimating to peace&quiet, when you've had little time for it..)
Cheers,
A.