A very similar story to how I got involved in SO. Different details, was Wright Stuff, had to do with ES telling my daughter where to launch, etc.
First, I'm sorry to hear about your daughter's experience. One of the things that tears me up every year is to hear these stories. And ES making up or adding rules is one of my hot buttons.
But, let me mention the fact that SO depends on volunteers to function. Almost every ES is a volunteer and receives no pay for what they do. They do it for the love of helping children learn to love science. Maybe not always successfully as in this case, but for that reason.
So, what can you do.
For your daughter, I hope you reassured her it was not her fault, not intentional, and not out of malice. If she has a good flying airplane, what she learned doing that far outweighs any award she should have gotten. That won't make up fully, but I hope it makes up some.
For yourself, was your daughter prepared to argue her case with the ES? It may not have made a difference, but that is the place to start. And that is a important skill to give all children, the ability to respectfully and fluently disagree with authority when appropriate. Personally I love it when a student politely challenges me on the rules with evidence. Those kids impress me. And it helps keep me from mistakes, I'm not perfect.
Next, was one of the team coaches there to help/backup your daughter? Did you get one there? Did they file an appeal?
There is a proper way to dispute such rulings, you don't always win, even when in the right, but you don't always lose either and only an appeal can change things.
Finally, if suitable to your interests in life, consider taking the route I (and others) took. Volunteer. SO is always looking for competent volunteers in all areas. Pick an area you have something to contribute and make sure its done right. It doesn't have to be forever (17 years for me now, my daughter has grown up and become a national event supervisor too), but capable volunteers are always welcome and valued.