From what I can tell Musk is literally a founder of SpaceX. I know he was a dick to the founders of Tesla, and he deserves shit for that, but it is a fact that Tesla has come very far since then under his leadership, and any claim that the founders would have done better is pure speculation. And of course the teams at these companies deserve credit, which he consistently admits. People who are obsessed with tearing down Tesla/SpaceX are often inconsistent in that any good thing these companies do cannot be attributed at all to Elon, because “he’s just a grifter hypeman, the team/other founders deserve the credit”, but any bad press they get is somehow entirely Elon’s fault. The truth is just that he’s partially responsible for all the good and the bad.
From accounts of people who have actually worked with him, he’s a legitimately smart guy with a laser focus on executing, albeit a micromanager. All the people I’ve seen saying he’s just some idiot MBA type who doesn’t actually believe what he’s selling are random media personalities and pundits. I can’t claim to know which is true, but one is certainly more credible than the other.