a mature 19 year old is the exception not the rule so you have to give this guy a pass, but I believe his family should counsel him because he has demonstrated a rather bad attitude that needs to be addressed.
First, when the draft did not go his way he was sulking very visibly.
Second, when the team paying him millions introduced him to the press he threw his jersey to the floor after the presser.
Do these actions mean anything? Maybe, maybe not, but when you combine them to the three off the court incidents that have been identified you have a problem that needs to be addressed by his family if not by the team. After all, he is only 19.