The only 'grift' that holds up is about FSD. Everything else is nonsense. They are making Boring tunnels, the costumer paid and they delivered. The company didn't take off as much as Musk hoped but calling it a 'grift' isn't accurate.
Hyperloop was never promised, that's literally just people who don't like Musk made up. In fact he EXPLICITLY said 'I'm not gone build Hyperloop, its just an idea I had', and then people who don't like him 10 years later 'where is the promised Hyperloop'. How does that make sense? Musk never received a single $ for Hyperloop, but somehow this is a 'grift'.
> how many billions of dollars in government subsidies?
They are big cooperation's in capital intensive industries. When you build big investments, you get government tax reduction and other things, this is literally normal. If you don't like it, that's fine, but that how it works. Its not a 'grift' unless you want to go down the 'modern capitalism is grift' route.
Outside of that, most subsidies he got, were just universal subsidies that anybody could get. The US government gave the same amount of subsidies to foreign companies selling EV cars in the US. This was a plan to increase EV adoption in general. And arguably it worked. How is again is this a 'grift'.
And for SpaceX, I think its pretty clear that the government got much, much, much more then it ever paid for when they paid SpaceX. I would argue SpaceX has already saved the US government more money then they ever paid for SpaceX development. Just Clipper going on Falcon Heavy is billions in savings.
There are plenty of reason to dislike him but those aren't really good ones. Except the FSD one, that one I think is quite bad. At least they finally allowed moving the FSD from one car to the next, but that's not enough.