Out of that post I got the feeling of an unhealthy obsession with being promoted, being promoted quickly, being recognised as excellent, nothing less-than-excellent on his review, complaining burn-out (really?).
I probably would have had a hard time dealing with what seems to be a youth with a big ego, with a needing behaviour, no idea of how to behave himself and how to balance life and work.
I get it, he was young, still, not the type of person I'd ever want to hire.