As someone who visits, works in and studies the management of theme parks I am very critical. Sorry if I seem negative but everyone who I knows agrees that SeaWorld and Busch Gardens are at the bottom in terms of service. They don't acknowledge their guests, they don't know how to solve problems, they don't show any enthusiasm in their work and a lot of them look like slobs. This isn't saying anything about the employees themselves. It says something about SeaWorld Parks Management. They don't uphold standards for their staff and constantly approach issues the wrong way.
If I had to guess, half of the front line employees at SeaWorld and Busch Gardens are only hired on for 6 months and then let go. I still don't know why they choose to staff their parks this way instead of just hiring in part time employees but they do. They make their employees feel like they aren't important and don't empower them to think outside the box or solve issues. It brings down morale and caries over into their interactions with guests; making for a poor experience in terms of service from the staff.
I believe a large number of the members on this forum are tourists and probably only go to the parks about once or twice a year. But Next time you go to SeaWorld, observe and try to see how many people look like they are enjoying themselves or are happy to serve you. Ask them questions about the parks rides, hours or any other information. Then do the same thing at Disney or Universal. I guarantee you will notice a difference or your money back!