When you're the largest shareholder then you can position your own people on the board of directors. That can also be just the largest shareholder. Value of a company is what shareholders make of it buying and selling the stock. Steve didn't own Apple anymore and was merely a small shareholder. Musk is totally different and has the controlling stakes in his companies. It sounds like you don't like the system because of Musk which is fine. I have no love for him either but he controls these companies so can do what he likes mostly.
Again, this isn't about Musk's positions in his companies, but what Musk is saying publicly and then not having the character and integrity to follow through on those statements he made publicly. If he is saying that he wants "free speech" on Twitter, he should not be going around deleting posts and suspending people from the platform he is saying should have "free speech". He's being a hypocrite when it comes to that, and that is the crux of the matter.
BL.