I think what you're describing, though, is along the lines of what is meant by the term "toxic fandom". One extreme variant of that is harassing actors and actresses or other creative professionals. But it also involves this kind of hostility not based on subjective judgements of the quality of, in this case, Disney films, but a sense that Disney as something you cared about is personally disrespecting you through the entertainment it is produces. This is then translated into an effort to wrest back control of what they are producing mainly through this kind of relentless negativity in the fan community.
To be clear, I am not saying you are toxic nor that everyone needs to be positive about anything they don't like. You and I have agreed on other threads about things we see as highly negative in the parks. In general, I am of the opinion that Disney has made visiting WDW too complicated and expensive for it to be worth it for the time being.
What we were talking about here, though, is thread after thread full of people gleefully rubbing their hands over the prospect of films failing they both haven't seen and don't have any interest in seeing as a way of sticking it to Disney. In this case, the reviews aren't even particularly bad and it is supposed to be the thing everyone wants: an original story. Without seeing it, though, people are declaring that it needs to fail because the story isn't good or original enough as what I think is a fig leaf for a more general desire to see Disney suffer.
Exactly. What is striking to me is not that people don't find certain films appealing. In my case, I never bothered seeing Lightyear or Strange World, for example, as neither really appealed. What is striking is that there seem to be a small group dedicated solely to predicting and cheering on the failure of film after film.