My 2 cents about the "this story is literally me" arc. Yes, it's part his narcissism that makes him act like this, but another huge contributing factor is his hermit lifestyle. He thinks the things that happened in his life are somehow exceptional, because he doesn't interact with other people. He's the kind of person who thinks having to pay bills on time is a huge, mature-style, burden and effort, so if he'd see a story of someone struggling with bills he immediately forms a connection. Same deal when it comes to "being lied about online" (except what's being told about DSP is mostly true).
He's incapable of reflecting on his life and thinking 'hmm, maybe other people get through these same things without making a whole big drama about it, crying to the internet and begging for money?'. He can't realize that his inability to handle and cope with these mundane things ("oh no, someone is making fun of me on the internet"), is what makes them exceptional.
His psychology is really interesting.