I think the parts that are really telling are the constant emphasis on being extremely awkward around people, being riddled with social anxiety, and a deep desire to "fit in." The fact that they describe coming to the conclusion as a prospective opportunity to "be happy with myself" raises a ton of red flags, and based on the later comments I'm assuming they didn't talk to a therapist about this at all before diving into transitioning.
Hell, I wonder if the "all my friends left me" came around less because of the actual trans part and more because they just sound so high-maintenance even prior to deciding they were trans. The "I can't go anywhere unless I know someone else who is there" (translation: "I'm going to awkwardly tail behind whoever I know there for the entire event and probably won't even talk to anyone else anyways"), the "I went to a therapist for a month or two and have sworn off all therapy," and the apparent desire to just ignore all advice regardless already makes them sound exhausting to deal with. I can't imagine what other arbitrary social rules and expectations they have for people even prior to transitioning, much less the trans-specific rules that were likely added on top of that.
Dude seriously needs therapy, not a reddit forum.