I don't think he's a genius but if he is, it'd still be underneath my standards.

I can think of lots of significant people I wouldn't work for..

Get down to A&E quick, you've clearly drunk a potentially fatal amount of Elon KoolAid. Musk is a buffoon. Clever? yes by all accounts, genius? Hardly. He's had luck, made good judgments mostly offsetting the bad ones. Most of all he has enough money to power through errors that would bankrupt thee & me.

Evidently not genius enough to not have his car business and global image fail. Genius he might be, but he's only entrenching his position in a way not dissimilar to cults: by alienating a lot of people you can get loyalty from a selected few. If that's the kind of power he wants, sure, he's a genius. But a good businessman is something else.

Let's assume that you are correct. How is that relevant to how good he is as an employer? There are lots of people in history who were very significant and perhaps geniuses in some way that I wouldn't want to work for in a billion years.