While the Starship program has been progressing far more slowly than anticipated (no surprise here, of course) it's basically on track and if they manage to create a fully reusable heavy lift rocket, that will be a huge leap for all of humanity. Those exploding rockets are very much part of the plan and represent an approach to developing new technology that is worth emulating.
As for Tesla, yeah, the cybertruck is probably a dud. But that's far from disastrous for them. Right now the EV market is in a bit of a tough spot, because competition is ramping up and demand can be fickle. But this is also the time when future market share is decided and Tesla is in a very good position to take a huge slice of the pie.
So yeah, the guy's a huge asshole but writing him off is very premature.