Meh. I don't like surprises. I know this about myself. It's a valid thing not to like. Just like I am perfectly capable of hating birthday cake (I don't), crocodiles (I do), etc. People like different things. I dislike surprises. That very much includes sudden schedule changes. I'd far rather not have a schedule, than have one that suddenly veers off course. But sometimes? Despite my best efforts, shit I don't like, happens. That's just life, and nothing to be done about it.
Throwing a fit about not liking surprises? That's different. That's something I can do something about, something I can work on. Okay. How to handle disappointment, changing XYZ, adapting faster to ABC, etc. (AKA parsing what happens to cause the fit.) That's -for me- primarily emotional monitoring and regulation. That's learning how to take something I dislike & not letting it domino into more stuff I dislike. I don't have control over the first thing that happens, but I can learn control over my reactions, which is what causes the next series of things I don't like.