It's a frame issue. I'm not wildly excited about the cover, but it's kinda tiring that the same group of people always finds a way to find the worst thing to say about every action the franchise does. Does matter if it's D&D or something else. Which is why I say it's an Internet thing: the echo chamber of negativity always amplifies itself and drowns out positivity.
I'm an old man shaking my fist at clouds though, trying to remember a time when reading about my favorite things wasn't a constant stream of negativity.
Oh for sure, things were much simpler before the Internet. I was also much younger and didn't have as specific wants in my gaming back when I had a blast playing Heroes Unlimited and Palladium Robotech.
I'd hesitate to call what you're seeing an echo chamber though. For sure, any online community for just about
anything is going to be an outlier in the greater interest group for having enough interest to choose to talk about that specific thing online. And with that comes more extreme or intense feelings about what's being discussed than what you'd likely get in a more localized discussion. But in general, and specifically
here, diverse views on any given topic are present and welcomed (outside of some specific taboos meant to
keep the community a welcoming one).
If there are a greater ratio of negative to positive comments about a given official release, it might have less to do with an echo chamber, and more to do with the fact that as a community, this place is bound to skew towards older players in general. It's an older community, and it's a
forum, which is sadly not really as popular a format for discussion as it once was. So you'll have people whose preferences were formed by editions in some ways wildly different than what's being put out there more (not to mention people who feel that this iteration of D&D isn't different
enough from what they've been playing for the last decade).
That said, the comments and arguments in support are definitely visible, and at least in my case, noticed. You are right that ultimately it's the contents of the book that will matter, and your point of how there have definitely been duds in the past is well taken (though in fairness, if TSR had put out a marketing release with only that cover to go by, I would have similar criticisms that I do for this one).