I guess my brother needs to go home right?

My younger brother is nearly 22 and literally isn't good at anything (not even strength; without even trying too much I can knock him out in one punch; seriously), has no actual skills (not even take a bus by himself to longer distance or meet up a friend), doesn't work, has wild episodes with tantrums, has limited to no social life, had to get paid to have sex once and isn't interested in hobbies nor sports at all. My parents are super worried about him. There aren't any benefits for him in our country. He was really born in FL, USA.

My parents have tried every option possible from taking him to different specialists, therapists, get him involved in social activities, enrolling him in English classes, placing him martial arts, etc. I've tried getting him involved in parties and more social activities. There isn't any improvement. Nothing. He is failing in everything and his future is uncertain. Every single exam done on him about autism came out negative. He has no autism and his brain scan showed it fuctions normal. He has no brain lesions. So my parents are really at lost now.

Now together, we're thinking that perhaps he needs to go home... go to his house, his homecountry where they can give him help he needs. He would have all the benefits for being a native born US citizen. There aren't any benefits for him over here.

Updates
1 mo
In his school years, he got treated poorly by his classmates. They treated him as if he was some type of weird foreigner. It makes it worse that he got bullied but really isn't good at anything either.
I guess my brother needs to go home right?
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