I don't know about the others, but Zuckerberg can absolutely destroy Meta. He owns a special class of shares that have 10x voting power vs. normal shares, so he personally controls about 60% of the votes. If there was any way of Zuckerberg getting ousted by investors, there's no way they would have let the company lose so much money for so long trying to make VR a thing.
Even then he has a fiduciary duty - provided he acts in bad faith (and it is egregious enough); I think it would still be possible to oust him due to that.
