Thule - even if you decide to quit, know that there are positives to be found with your job. you were able to combat your social anxiety, you got paid, you were able to conquer that part of yourself
I don't know why people feel "fake" to you, but I can understand the deceit and dishonesty in people. I am reaching the same point. Maybe you need to come to a peace with the traditional 'climb the ladder' kissing *** that goes on and decide if it's for you?
good luck finding sleep