He was always a shitty person. Even in his adolescence.

He made fun of his classmate because his classmates father committed suicide. That classmate responded by shoving him down the stairs. Which honestly should have happened more.

He was always rotten to the core.

He has always had some pretty shitty opinions about things and a shitty way of doing business. Tesla was basically stolen by Musk from the guys who founded it, then he tried to rewrite Tesla history and label himself as the soul founder, at which point the actual founders had to sue him to maintain their founder status, and that was all in 2009, so unless you tell me that you bought the Roadster in 2008, I have a really hard time believing you. Or you're one of those people that don't care about things until it's literally shoved in your face. But I digress. Sure you didn't know.

But what's stopping you from selling the one you have now, since you do know, now?

I bought mine before he went crazy.

Musk was an asshole since PayPal

You bought yours before 2018? Because that's the cut-off for when supporting anything Musk does was acceptable. Butting his way into an emergency situation offering "help" that lacked any awareness of what was actually needed, and getting so butthurt when told he wasn't helping that he accused the heroes actually saving children's lives of being paedophiles, and hiring PIs to try and track down dirt on them to that effect, is inexcusable. And then lying to a court to pretend that calling someone a paedophile is not a serious insult in South Africa, in order to win the defamation suit.

It was a prominent enough news event that unlike his many flaws from before then, Tesla owners cannot reasonably claim ignorance after 2018.

But anyone who genuinely did buy their Tesla before then is fine in my books. As winkerjadams says, selling your car now won't hurt them. Not enough to matter, anyway. (In theory, more people selling might reduce the resale value, which will reduce incentive for people to buy new, reducing Tesla's value. But I suspect that's a miniscule effect in the EV market.)