I would say Musk hasn't accomplished anything himself. He has seemingly built a few teams of people who went on to build things, but the man himself demonstrates a fairly pedestrian knowledge of many technical concepts. This is evident in his own statements - he uses buzzwords in the wrong contexts and has every indicator of someone who desperately wants to be seen as the smartest person in the room.

The companies he has acquired and built are impressive, for sure, but I think Musk's specific involvement in them has been to their detriment and they would have been more successful with <random venture capitalist favorite> at the helm.

Musk reminds me of every struggling-to-understand-the-world pubescent beast I met as a teenager. His inability to reflect on his own words and actions has resulted in a man so dangerously attached to his ego that instead of saying "Well - I was wrong" about COVID, he says things like "my pronouns are Prosecute/Fauci". It's just one of many incoherent ideas that comprise his incoherent worldview. The only difference between him and the drunk idiot at the local dive bar is money. Cheap booze makes you dumb while whatever drugs rich people do also make you dumb but you can afford all the other offsetting lifestyle choices that keep it from making you super dumb.

TLDR: Musk sucks but he has money and people confuse that with success and morality.