He's bad at communicating. It may be because he's autistic, but ultimately that part is not relevant.

The way humans in bulk receive public communications is a fact of nature; it would be like someone swimming in the ocean and drowning and saying that it was bad that the ocean couldn't accept their style of swimming.

He's a public figure and certain actions undertaken by public figures when communicating with millions of people are bad. He undertook those actions and suffered the negative consequences. It's ultimately not related to his neurodivergence; there are autistic people who don't make huge PR blunders.