You're always going to have power struggles in startups. That's the nature of the beast when you put highly motivated, competitive individuals in a room, but the smartest of the players know that with the help of everyone around them, their chances of success increase many times over.
LISA? kicked off the team
Macintosh? I'm typing from one right now
NEXTStep? considering the technology forms the foundation for OSX and iOS doesn't look like it flopped.
AppleTV? it's doing better than it's competition, maybe.
Apple Hifi? definitely.
Pixar? I think other animation studios wish they could as good as their worst films.
Over the course of his career most of his "flops" have turned out successful. He pumped millions of dollars over a decade to keep Pixar afloat. And it was him and his technical team at NEXT that turned the Mac into what it is today.