Handbags   (The sad, the bad and the ugly. Non-productive stuff here.)

Well,in his defence, for what it is... He needs to stay in until his Mother comes home so she can take him out to wherever he needs to go. As such, he resents anyone with a normal life, and baits people until they bite so he can pour out his bile towards them, he is, if you please, blaming them for his situation.
I feel sorry for him, so play along with him until he has gotten it out of his system, saves him shouting at, and possibly striking out at, his Mother.
So I am doing him a favour really.
But I fear I must stop, I hope his Mother does the right thing and reports him to Social services, and he gets to live alone.
I take partial blame in that I should take my own advice, and refuse to feed the troll.
Again, I hope his Mother seeks help as soon as is possible.