I think people are underestimating the runway Tesla has, here. Tesla didn't even die in 2008. Now, they have a huge customer base, two other high-end car lines that are themselves doing well, and an enormous amount of goodwill plus a big moat (for charging in particular, at least in the US). Not only that, but SpaceX is doing fantastically well unlike in 2008.
I think the hardcore bears are just plain wrong, here. I don't know whether or not Tesla is over-valued (above my pay grade, and I'm not invested anyway), but it's hard to make the case that Tesla is worse off now than in 2008.