His entire issue is being a head case. I don't put any stock in this mental health stuff he's been on about. In terms of his physical gifts he was born to replace Teemu Selänne as the Finnish GOAT, but he doesn't have the attitude. He's only ever been good when the game is easy for him. If anything this mental health stuff is going to further impede him achieving his destiny. The second he encounters adversity he's going to retreat into his security blanket again.
Dude. He's a kid. Everybody has a path where they need to figure out things about themselves, their past and how to overcome personal problems. Some fail on that path, some don't, but reducing all that to 'headcase' is misguided. It sounds like PK's detractors using the same brand of shit slinging.
I've personally known several people who've gone through similar situations at the age (minus the millions in $, which is not failsafe against depression et al) and some came out of it as very different people. Personality stayed the same, but their lives became better because they had awakenings/introspection that led to behavioral change. When the trade happened, I started reading-up on what happened to him. The way he described things, it sounded very familiar to those I mentioned before. Only time will tell if he turned a corner or if it was all a sham of pretty words, but I think he deserves the benefit of doubt.