[Someone]

Complete failure? Are you arguing that the products that came out during his reign are below par? Above par despite his supervision? Not worth the psychological damage he did?

I doubt Apple would be where it is today if he had played mr. Nice.

Also, is there data that supports a claim that, e.g. churn was higher under his leadership than under other managers in similar situations? I am not aware of any, and it would not surprise me if there is data supporting the claim that churn was lower (in some sense just as Napoleon was able to breed loyalty, even though he led his soldiers to war again and again). For example, from what I have read about Steve, when working for him, he could be very harsh, but you would not have to worry about being shot in the back. That is worth something.