well considering I usually stay at DVC resorts, thank God I never leave a tip
(despite what my wife says, I am NOT cheap! I'm financially conservative. There's a world of difference)
I think the OP is in the right to be angry. Look, why do we always go back to Disney World? It doesn't matter how many times we go on the same rides, the Haunted Mansion is always Haunted, IASW is always small. And the father will always burn the darn turkey on xmas eve. So why on earth do we keep going back when there's "other places in the world to go to"? (I am so sick of that question)
The service! We, the consumer, hold Disney to a certain criteria when it comes to service. We expect to be treated a certain way in every aspect, from the way our rooms look, to the way every cm talks to us.
And that's what Walt wanted! In anything he set out to do, he wanted to be the best in the world at what he did. And he didn't feel any differently when it came to his parks!
So to the OP, I'm on your side, and please reach out to the WDC, I promise you they'd want to know that they didn't live up to your expectations.