Copious amounts of chemical filters in order to avoid processing reality.
Or just disconnect from the false internal narrative that things were ever going to be okay. History is one big story of shitty things happening to good people. If you get rid of the just-world fallacy and accept that this part of humanity just crops up sometimes, you'll probably be happier.
Yeah the world is collapsing, it does that every 50 years or so.

As long as it cycles correctly, it'll be fine. You got the shitty meme gun so it looks a little shit.
But also a handgun is worse than useless unless you practice shooting it. I'd trust someone to just pick up a rifle and use it in self-defense. I wouldn't do the same for a handgun. Unless you can hit a man size target from draw regularly, I wouldn't use it even in an emergency. A fucked up trigger pull or flinching will literally prevent you from hitting the broad side of a barn.