There was a big case a few years back where the directors of an ice cream company were found to be liable for not paying sufficiently close attention to food safety issues (Marchand v Barnhill). Since then, this type of claim - historically a tough one for plaintiffs to prevail on - has become increasingly popular. One was brought against the Solarwinds directors for the hack (the directors won) and another was brought against the Boeing board for the (first round of the) 737 Max debacle. I don’t know how that case turned out - I know the plaintiffs won an early procedural victory, and I assume Boeing settled, but in a quick search, I can’t find anything definitive on the current status of that case.
Tesla's Board has eight members. One is Musk. Another is his brother. One is the CEO of Redwood Materials. Two are VCs.
It would take activist pressure to dethrone Musk. Tesla's sky-high valuation protects against that.