What ever he has done so far hasn't done much to hurt sales. They are selling all the Model 3 and Model Y vehicles they can make. Heck, even some of the OEMs are trying to ride on his shirttails.
Two sayings: "There's no such thing as bad publicity." "There's only one thing worse then being talked about, and that is not being talked about."
Folks are buying a Tesla, for performance, technology, and their charging network.