It's definitely not too late to reverse the damage
If he genuinely apologized to people, denounced Trump, and started acting normal, I believe it would be ok to buy a Tesla again. He'd also need to start moderating X properly and stop allowing assholes to pollute it with nazi like propaganda
However, as it stands, he's basically shat on the people who buy his products and supported the ones who scaremongering against EVs.
Don't even let his family name live on. That's that be wants
Just treat him like a number and call him 45