I mean if you read some of what his first wife wrote, he was pretty much this bad. Though at the time she was saying it the world didn't want to hear it. He also did the whole retcon Tesla to be founded by him over 15 years ago, in some pretty petty behavior. When x.com failed relative to PayPal, he somehow managed to get them to merge and make him the head of PayPal, and then they kicked him down when we almost tanked PayPal.

It basically seems that a critical mass of people were covering for him and propping up the brand of his name and image, likely for the sake of their investments. Which should be a fairly familiar story, because 80s Trump had the same things going on, very bad business results glossed over by investors needing to keep the Trump brand strong for the sake of their own money. Both trump and musk successfully tied up some big business fate with their names specifically, forcing investors to play into the conceit.