Love him or hate him, without Musk Tesla would have been dead in the water as a company and its shares would have been worthless by now. Those stock owners knew what they did when they got into TSLA.
I don't think there's any doubt that Musk has grown Tesla significantly and had a very positive impact on the share price, but that's something he did in the past. You can't just accept everything he does in the future because of past wins. Tesla shareholders don't owe him anything. He's there to do a job, and if he's not doing it well then they should complain.
There's a lesson here for all of us. If you think you're safe in your role because of some good work you did in the past you are wrong. You were paid for that work. It's gone now. Hopefully your employer recognises your ability and talent and believes you'll do good work again, but of they believe it was luck, or that you're now too old and stuck in your ways then your previous victories won't help you at all.
What happened in the past is a sunk cost. Using it as a basis for future decisions while ignoring the present is a terrible, terrible way to move forwards.