1. Get a grip.

2. From the side-by-side on UIL's website: (12) May students miss class for practice at the site of a post-district athletic, academic, or fine arts contest? UIL strongly discourages any loss of school time for practice scheduled away from that school’s campus. Furthermore, TEC §33.081 (a) states, “The rules must, to the extent possible, preserve the school day for academic purposes.” This language in the statute is the basis for adopting a rule which allows for practice of an extracurricular activity for one period of the day and preserving the remainder of the school day for academics. In addition, practice is limited to one hour during the school day.

Emphasis mine. Strongly discouraged is not prohibited. Area is post-district.

Later, in the side-by-side, your protest point hinges upon:

(15) How much time may be used for practice of a non-athletic extracurricular activity during the school day? Students may not miss other classes for the purposes of practice for extracurricular academic, fine arts, or athletic activities, such as one-act plays, speech or debate contests, etc. If the student is scheduled for a class that is directly affiliated with the activity (e.g., theatre/one-act play), only the amount of time scheduled for that class may be used for practice purposes. (19 TAC §76.1001 [e] [1], [2] and [3].)

If the school has a 90 minute block schedule, and said school practiced for 90 minutes or fewer, they're perfectly in the clear.

IMO, this protest will go exactly nowhere.

Finally, this isn't why you lost at Area. It's not a controversy just because someone did something you don't like.