If someone is so unhinged that he repedatly can't control his language and emotions, it is a valid reason to suspect that these Person might have serious psychological Problems. So this Person might not be suitable to perform his dutys as CEO of a Company. And he also shouldn't because the Stress and Pressure that comes with this Postion might add to his Problem.

He's a CEO. His job is to guide his company to make money. His actions are actively doing the opposite: he is causing his company to lose money.

While this happens from time to time, a smart, presumably stable CEO reverses course and engages in damage control when this happens. Instead, Musk is doubling down hard, despite knowing full well this is likely to destroy the platform formerly known as Twitter.

Look at it this way. You have an investment banker than handles investing a great deal of your money. You just found out said banker just made a series of awful decisions which caused the investments of several of their other clients to crash. They are unrepentant and refuse to take responsibility, instead telling those involved to go fuck themselves.

Would you want that person to continue to handle your money?

Well, good decisions aren't his forte, so what else is left there?

A bit of clear eyed professionalism would be a good start.

What he has achieved in the past is in the past.

Tesla is a major public traded company.

Business is business.

Your charismatic public facing CEO has turned from an asset to a liability?

Punt him.

Tesla is facing some headwinds, increasing competition in the EV space, reported troubles with some of its upcoming products, industrial disputes. Nothing that can’t be dealt with … If your CEO is not shitting the bed in public in another company and quite clearly under a lot of stress.

How can he be providing the attention and care Tesla needs from its CEO and for that matter Space X etc etc

More importantly how are the public, shareholders, customers viewing this? Do they think there is a loose unit in charge behaving irrationally and will that affect the confidence in the company?