What I am trying to say is that this isn't a crisis, and it isn't depression, and he isn't a creep. This is a guy with obvious physical and behavior traits of a neurological condition. In several scenes he even experiences severe migraines.
I vote for 'creep'. No really I'm not unempathetic, I'm sure he has his issues...it's just that he's a talentless--I never liked him, that's all. His behaviour has never been different though so you can't attribute it to mlc or anything else.
Velika, mlc is like that proverbial elephant. If you see only it's tail, you think it's a snake, if you feel it's hide, you think it's a tree, etc, etc. It is possible that mlc has bio-chemical causes, who knows? But there are lots of other possibilities [hormones, dementia, even too much anesthesia]--we have several threads somewhere on this.
It doesn't really matter. I suspect we won't know in my lifetime. I wish it was as simple as a single cause. All we know is we have to get on with our lives.