>>44437635These issues stem from poor upbringing and his parents not putting enough effort into sorting them out.
There are many mentally ill adults with schizophrenia and the like who don't throw such tantrums because they're parents probably didn't let them.
In this case his parents did pretty much everything for him and let him have whatever he wanted, until he turned 18 that is.
If he wasn't as anti-social then perhaps he would have learned on his own that tantrums are ineffective beyond childhood but he hasn't had to deal with that for nearly 12 years now and thus he likely still maintains that such fits are adequate ways of solving problems.
Much of his mental health issues likely stem from his childhood and I lay the blame squarely on the parents, no matter how nice they were trying to be to him.