I really don't want to be defending Elon, but I think saying "Elon must be stupid because of how he handled Twitter" is as silly as "Elon had success with Tesla

I really don't want to be defending Elon, but I think saying "Elon must be stupid because of how he handled Twitter" is as silly as "Elon had success with Tesla and SpaceX therefore he knows how to run companies". Those two seem like two extremes. The answer seems more along the lines of, Twitter and its problems are very very different from Tesla/SpaceX, and while Elon may have been good at the latter, he has zero experience with the former. That being said, not realizing the above I guess makes him partly not-smart, and I assume the shortsightedness was due to the inflated ego caused by his previous two successes.