It sounds in several places in the article like he has a severe case of impostor syndrome.
Fortunately (spoiler) at the end of the article, after his time at the MIT research lab, he sees that some traditionally super smart people value him and see him as intellectually special.
Yes, I think he has a bit executive dysfunction -- a bit unable to set and follow up on long term goals.
That'd make it hard for him to join a uni or find ways to make use of his abilities.
I wonder if he'd be more happy, working as a language teacher assistant (why assistant? see the 1st sentence above), for all languages they teach at some university nearby :-)
Fortunately (spoiler) at the end of the article, after his time at the MIT research lab, he sees that some traditionally super smart people value him and see him as intellectually special.