Yes, I’m fully aware of it. Very cool, but it never got any further than the prototype stage AFAIK - SpaceX made it work and has lowered the price to orbit considerably and the rest of the industry is scrambling to catch up.
Scientists are really looking forward to Starship because of the incredible potential it provides. If SpaceX manages to get it working, it’ll likely change space exploration in a massive way. I find that quite exciting.
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.