Outside of the technology bubble, most people don't know or care about many of the issues you cited, or what "loyal followers" on internet forums think. Major investors, who are the only people who could force Cook out, care about the numbers. And while Apple's revenue declined this year, it's still insanely good by any reasonable, and unreasonable, measure. Plus, it comes on the back of many years of growth, much of which was delivered under Cook's leadership.
If there's a continued decline of revenue and profits, then you might see Cook forced out in a couple of years, but to ask why he hasn't been forced out already only demonstrates a total lack of understanding of how business works.