Google isn't a good example in my opinion though, generally people besides the CEO announce their products, i.e. Google Maps was announced by Bret Taylor. Look at the history of Google and Microsoft and you will see tons of "xxx announces/introduces yyy". Tesla's entire history is "Elon Musk announces ..." (after teasing on Twitter for 5 months to keep the stock price up).
I don't think everything is bad about him. I think the thing he is amazing at is setting the vision for his companies - which is really valuable. It really seems like everyone understands the mission and where things are going and he's very clear about it. So I think he has good qualities, I just think he's also narcissistic, financially impulsive and unfocused.