In order to solve some seemingly and hilariously sarcastic issues FOR FREE, here is my Professional Suggestion.
(I have no interest in arguing with anyone about what kind of person Elon Musk is, it would be a fucking stupid waste of time)
Please process some Anonymous questionnaire survey with those Former employees for two special questions as below
A. Why did you join his companies?
B. What kind of reason encouraged you to quit / leave?