If there was a superhero called Super-Autist, what would be his superpowers?

Be able to recite everything they've ever read, yet unable to recall relevant information on demand.

Walk through social constructs as if they were air.

Obliterate objects by hyperfixating on them.

Drive villains mad by monologuing intensely at them about radio tower structural design history.

Fatal weakness: When costume is any of: A bit too dirty, smells to much of softener, too tight on the wrists, too loose on the elbows, a bit itchy, smells weird for no reason, did it have this color it looks wrong, no wait I put it on in the wrong order I have to take it all off and do it over again, cape touches neck

He can be a savant in a single domain of his choosing, but he can never read the room well enough to choose the right one.

They handling logistics for all the other super heros. All the mundane shipping, messaging hundreds of vendors, working with local government to handle events they do this all from their computer. Trello is their secret weapon. Know one knows their true identity, but no one knows their super hero identity either. They never leave the house. Their sidekick is just an ordinary cat.

But without them the world wouldn't last a day.

this Explains-Things-Back-To-You-Man is proving rather a nuisance. Make sure he has one of our .. little accidents.

DOOR SLAM

stop right there, Dr Euphemism. More than simply a nuisance, I am an active opponent of your plans. And you cannot "make sure" someone has an "accident" - then it becomes a deliberate act.

Super Too Much: gets more everything than everyone else.

Extreme levels of social awkwardness and the innate ability to infect/inject other people with it temporarily. An angry mob is throwing bricks in the streets? Let Sup-Aut talk to them for five minutes and everyone will be so uncomfortable that they'd rather go home than rioting. Sup-Aut is especially effective because they, too, would rather go home soon that continue standing in the spotlight, so these encounters usually take all of five minutes until the respective issue is resolved.

Weakness: everything they get told to resolve has to be done either RIGHT NOW and completely unprepared, or they'll procrastinate and prepare until the city burned to the ground. There is no middle ground between these extremes, and it is impossible to predict which one will happen.

counting toothpicks?

He is a surgeon He is a surgeon He is a surgeon

They already exist and their name is Murderbot. Check out the Murderbot Mysteries.

i saw this movie... 'no country for old men'

Total lack of empathy, saving the universe one Thanos Snap at a time.