Can you show me at what point there was some actual evaluation of why he was doing the things he was ? Because sorry but I don't see anything courageous or introspective there.
I just see a blind rant by somebody who clearly cares way too much about what his friends think.
Admitting things that make it obvious that you care too much what your friends think is courageous and introspective. He opened himself up to the inevitable ridicule of people like you (courage) and openly described things about himself that are widely viewed negatively by society (introspection).
He sounds young, and perhaps was a bit rude. In fact his second to last point was a turn-off for me. But, he made some valid points. I don't believe being excessively judgemental helps much.
I did like your advice to find better friends, and lose the others.
I just see a blind rant by somebody who clearly cares way too much about what his friends think.