Is negativity contagious? Has it all really gotten that bad?
Answer to the first question - yes.
Answer to the second question - no.
If someone posts a thread starter asking "just how bad is XXXX?", there will answers about how bad XXXX is. Whether it be an attraction, a resort, or a restaurant. But, if someone posts a thread starter asking, "we are going to be at XXXX and I'm not sure about it, what do you think?", there will be positives and negatives.
Anytime I see "bad" in a thread title, I look at the first post, chuckle, and then move on.
As far as if Disney World has gotten "that bad"? No - it's what each person experiences. Are some trips absolutely fantastic for that family? Sure - but for the next family to experience the identical things, it's not going to be fantastic. And for that second family, what they perceive as fantastic, won't be the same thing the third family thinks is fantastic.
Example - my husband and I just love walking around World Showcase as the last thing we do before ending our evening at Disney World. How many families with small children would think that was a perfect night? We also almost never go to Magic Kingdom. Same question for families with small children.
but we don't go there any more either