WDW is a product. The people that visit are customers. Any customer will have a set of standards it expects from any particular product; it is how they judge whether or not the value of the product/service is worth it's cost.
All of that said, this standard will be different for different customers. I think most people judge WDW against its other theme park competition - they say, "WDW is a better experience than Universal/IOA and Six Flags and that is why I happily spend the extra cost to attend often." And that is a perfectly reasonable opinion to hold.
However, other people have a different set of standards. For example, I happen to judge WDW against itself. When I look at Epcot, I say to myself "Is this better than EPCOT Center?" and the answer is "no". I judge the level of upkeep and maintenance versus what it was in the 80s and early 90s. I judge the opening of a park like AK against what EPCOT Center and MK were like when they opened. I find these comparisons are not favorable to modern day WDW; others may disagree.
And I don't just judge WDW against itself, I also judge it against it's domestic brother - Disneyland. That's another comparison WDW fails on many levels; imho. Again, reasonable people may disagree.
What does this all mean to the question posed in the first post? Are we jaded? I don't think so; it's just that many (most?) of the posters on this message board judge WDW against a different set of standards than the thread's creator. We're all customers; that is what we do. I know that based on my set of standards, over the last 15 years or so, the frequency of my trips has decreased from 1 (sometimes 2) trips a year to once every other year, the length of trips have decreased from a week to 4 or 5 days, and half these "Disney" trips are now to California instead of Florida. For me, I have discovered some better uses of my dollar. Do I still enjoy going to WDW? Sure. But I enjoy it less than I used to. I don't feel bad about expressing that opinion on a discussion board about WDW.