OK, try an experiential analogy. You live in a nice house, you love it there, but while you're on vacation the neighbours you let use it have trashed the place, dirtied the walls, broken the windows. It's not the same as it was when you return. Do you a) accept the damage as just changing times, b) hope that the repairmen will fix things up good as new and get them back to how they were or c) move house.
Those calling out WDW management are doing the second option - they remember WDW when it was amazing, reasonable value, want things to get better so they can experience those good times again.