With only two trips to your credit and both of those to Disney,you have not seen the RV world. You have to remember what Disney is to most people.
Most folks are driving 18 or 20 hours if not more with a load of misbehaving siblings.
Dad is upset because he cannot believe he is paying that kind of money to stand in the hot sun for hours so the kids can enjoy a mere fraction of that in riding time.
Then you have the 6 dollar burgers and 4 dollar drinks,the hiway insanity around the parks and on and on and on.
Get out of the area, hit a state park or two get out of state! Sure you will still find the attitude you experienced,but it will be much less prevalent.