You can find videos with him discussing rocket engines in details - he’s spent years working together with a lot of brilliant car and rocket engineers. He (again, not alone, of course) somehow managed to build a successful car company and a successful Space company. Both things are by all accounts very difficult. Not likely to be done by a stupid person.
I fully agree he’s a jerk and I would never want to work for him, but that doesn’t mean he’s stupid or that I can’t be impressed by what SpaceX has achieved.
It would be nice if Lemmy, kbin, etc. could be a bit more balanced and not go into complete shitstorm mode each time something that relates to Elon Musk is mentioned.