My son will be 4 in a month, and he is very aggressive toward his brothers. He hits, kicks, bites them and takes their toys. He screams at my 1-year-old constantly when he touches anything or sometimes for no reason. He screams at my 7-year-old until he gives up a toy he didn't want until someone else was playing with it. He often even screams and points his finger at me with a mean look on his face. When he's not screaming at us he constantly whines.
I have tried so many things to stop this angry behavior including taking him to a psychologist and therapy but nothing has worked. I tried to get a behavioral therapist but for a year now I've been getting turned down for any services. He runs our house and causes fights with everyone.
How do I stop his mean, aggressive and whiny behavior so we can have a happy home?