Behavioural issues, LD, ADHD,

Hello , My son gets very angry nd at times he hurts his parents especially mom nd even threatens to hurt himself. He was under psychiatrist nd counsellors treatment for 5yrs. But no changes just waste of money. From past 1yr he is at home doing nothing but playing play station or mobile . He has no friends nd doesn't go down to play as kids r of not his age group. Earlier he used to go occassionally but from past 6-8months he didnt even go out of his house. He gave 2 papers thru nios (12th grade) 1yr back . Last option from doctors is to keep him in a rehab. V visited some rehab in pune. But the patients over there r really very sick nd so they are there but my sons real issue is anger , depression nd anxiety. Then why should v keep him in a place like rehab. Is there no other place, where there is homely environment nd the child can b more comfortable. Rehabs hv people who r really in a very bad state. Will staying in a rehab help my child nd how? Is there no other way of treating?