Putting on clothing with collars and buttons is a huge hit to my sense of "authenticity", to start. You feel pressured to to put on airs, deal with smalltalk, etc.
But it's only putting on airs and small talk to you. Why is your perception normal and the regular one "fake"? I grew up thinking like you did, in a household of people like this, and there couldn't be anything further from the truth. It's a projection of an insecurity around being unable to control the people around you.
I've no interest in controlling the people around me. I'm interested in controlling myself, which I'm not allowed to do at work due to the need to survive. Your choices are determined by your options; you do not pick your options at work, your employer does.
Those who it's fake for are not allowed to throw it off.
I get my socialization in groups I choose to be a part of where I don't have to curtail my every thought to avoid political retaliation that affects my livelihood.
And get a PhD before you start throwing around words like "mental issues" for things you disagree with.