Because he had "considerable problems" with his Apple products? Basically Apple release unfinished product and let users test it - and it shows in the software quality.
(Don't even ask about the quality of any of their "1.0" products - full of bugs every time, newest example is the touch bar.)
(Don't even ask about the quality of any of their "1.0" products - full of bugs every time, newest example is the touch bar.)