It can be very traumatic when there is success like what you describe at a young age if that level of success is lost. He can’t see that he is still young and can work towards a new level of success. He doesn’t see what he still has despite the loss either. Instead he is bathing in anger and resentment. He should realize that he had a home that most his age can’t have and he furnished it with things many his age can’t even imagine. All he is seeing is the bad and wanting to distance from it.