Also, a reputation of being “crazy” at shows is not a bragging right. That’s not good, and reflects poorly on rider, trainer, and program.
OP, I really want you to know that I’m not trying to pile on! It seems apparent from your post that you’re under the impression that she’s “excited” and acting up due to a desire to work. I’m sure someone gave you that impression (IRL or through SM), but the reality is that horses like this are almost ALWAYS in pain. It is up to the humans to figure out how to fix the cause of such behavior - be it medical or training or environment.
Again, if you don’t own this horse, it’s way past time to find something else to ride. There are plenty of horses out there that aren’t trying to kill themselves and you. If you do own her, get the vet (a really really good one), spend the showing and lesson money on figuring out what is wrong with her, and then find a good, kind, horse first trainer to break the bad habits.