Before Jobs agreed to go back to Apple, he made sure he could pretty much do anything he wanted and never get fired. A lot of the changes he made were just as disruptive, if not more so, than the ones Johnson made.
Johnson tried to do that, and ran into two problems.
1 - He's not Steve Jobs, nobody is. He simply didn't have that 6th sense to make business decisions blindly and almost always be right.
2 - He didn't have that much freedom. Jobs would have stayed in power until Apple went bankrupt. They were that desperate and he had that much power.
Jobs refined one thing at a time over many, many iterations to an incredibly well thought-out polish of design and functionality. His marketing was also incredibly well thought out, carefully iterated, over a long time.
Johnson just seemed to think he could change stuff he didn't like with no iterations and no need to think it through. Plus he had no special focus, unlike Jobs with one key product at a time.
Johnson tried to do that, and ran into two problems.
1 - He's not Steve Jobs, nobody is. He simply didn't have that 6th sense to make business decisions blindly and almost always be right.
2 - He didn't have that much freedom. Jobs would have stayed in power until Apple went bankrupt. They were that desperate and he had that much power.