I've always favored the approach that while there are bad reactions and analysis of content, and that there are objective elements in all art forms so that an aesthetic grade can be loosely derived, there is no single source that or group that has a monopoly on truth when it comes to art. Taking a look at Roland Barthes, a famous literary critic that de-emphasized the elitism inherent in authorial intent, I want to point you to his quote on that:
That is a wonderfully profound philosophy that places must of the power of interpretation on the consumer/audience of art, but even though it supports the non-creator, it can still be applied to cases when individual tastes and analysis are subordinated to a group message. So, to answer your question, no the fandom are not gods of judgement here, nor are the show creators. Interpretation and general quality can be measured on an individual level depending on the value model the individual uses. For me, Season Six was fine, though not as good as the two seasons that preceded it. A few episodes this season were God Tier, and quite a few where enjoyable in their own right. That is a conclusion some may agree with, and some may disagree with. Both can be correct.