He's been through a lot.
Guessing his time with Milamar was quite traumatic.
First he gets his face burnt during that filmstunt, and then from Milamar herself.
Yeah though he's also done a ton of dope. He really looks like he's on some type of depressant drug in the first video. The eyes look irritated, and he has a bit of a flat affect. Maybe he was in withdrawal in Serbia and bought some roofies at the pharmacy, like my friends did back in the day in serbia

ESFitness could probably tell me if I'm off in my assessment
