It’s a completely different business vertical. Running a government rocketship contract or vehicle manufacturer isnt the same as software development or social media. Plus he’s made so many decisions that are laughably stupid to the layman that it almost seems like he’s tanking it purposefully.
Businesses aren’t all the same and the same type of person can’t run all of them. It’s like asking your heart doctor to give you a urologists opinion.
Tesla started with almost nothing, SpaceX was his from the ground up. I’m not certain how much of Paypal was his but something tells me he was in management there too.
No one’s claiming he developed the Tesla Model 3, or engineered the landing system of the Dragon boosters himself. He has been in charge of the people who have though, and he seems to be doing well enough of a job to keep those companies going.
So he’s not good at managing a social media platform specifically, if he’s actually trying and this isn’t just a long con to destroy the site for some other end goal.