Nobody said he didn't have "accomplishments". They said he's a sociopath and has no good sense of anything.
Basically Musk made it rich out of luck after Peter Thiel and friends bought his payment company. He managed the merged company, PayPal, for a short while before Thiel kicked him out for being incompetent.
He decided he really liked what Tesla was doing (not hard to do!) and recognized that US oil consumption was, at the time, considered a national security issue and felt one way or another a car company like Tesla would get help - so he bought it, took it over (this time with nobody in control enough to say no), and, well, kept fucking up. BUT because the product was compelling (not something he did, merely something he recognized) and because he is a decent salesman, the company managed to avoid bankruptcy, and the cult around him forced the share price through the roof.
I mean, this is a company where one of the stories told about "how good" Musk is involved Musk realizing, days away from bankruptcy, that Tesla hadn't actually fulfilled most of its pre-orders, and maybe it would be a good idea to get the cars rotting on the lots out to the people who put down deposits. So he pressganged everyone at Tesla, even the computer programmers, into calling everyone who put down a deposit to ask them if they wanted to buy the cars.
This is told, by Musk fans, as a story about how great a manager and CEO Musk is, rather than a sign Tesla is abysmally run.
Then there's SpaceX. Which *is* well run! Yes! But it's also famous for having an entire team of people whose job it is to manage Musk when he visits because they know he's awful.
Then there's the Boring Company. Uhm. OK. What happened to that again?
Then there's X. He takes over the second most popular social media network on Earth, whose infrastructure worked, alienates and/or fires most of those working for it, makes grand pronouncements about the technology that are clearly ill informed, and the thing he turned it into is... terrible. I mean, I can't even see a thread any more without logging in. And if someone links to a post all I see is the post itself (no replies) and a lot of spinning gifs. Meanwhile everyone that was worth following has fled to Threads, Bluesky, or the fediverse. The only reason it hasn't crashed out completely is inertia. And's clearly losing more money than it was when it was independent.
He's not a great business man, he's someone who knew what to invest in, but everything he's micromanaged has either failed, or succeeded despite him.
Yes he has accomplishments, but he's nonetheless awful. He's a walking demonstration that America needs to get over its obsession and worship of rich people. They aren't that smart. In fact, most of the richest among us seem to be the biggest idiots.