let us know if you find a solution to social anxiety and especially existential dread
Society believes alcohol changes personality, and that drunk people are less themselves. Thus, they judge drunk people less harshly (including themselves).
But alcohol doesn't actually change personality. It only makes your brain work slower. It doesn't make it go anywhere it otherwise wouldn't, you just get there later.
What we've developed is a way to split up when we're accountable. I promise you that split is zero-sum: the more leniently they judge your social behaviour when drunk, the more harshly they judge it when you're sober.
It's an example of bad high-status science suppressing good low-status science. Neurochemists asking, "Why does alcohol make us do this?" without checking with cultural anthropologists if it actually does make us do this, or if it just makes "WEIRD" people do it.
I did not say it was all in your head, by the way. The lower reaction times and slower thinking is obviously real (and present everywhere).
I suggest studying epistemology
So maybe organized, community-oriented religion is the right suggestion? Or some secular organization devoted to community betterment?
If you aren't already in such dire straits as to require this kind of help, it really seems like a form of self-harm to me. I've met many people who've gone through 12 steps. Some advocate for it, some protest it. I'm genuinely happy for people to get the help they need wherever they can find it. But I absolutely would not recommend it to someone that isn't already so desperate that they're willing to give up their autonomy because they don't know what else to do.