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?