Grouse,
It seems as though the majority has spoken already. If the kids are not open to it then it seems to be end of discussion.l
As much as I feel for these kids they need to take the approach the 4th graders did. Work Harder and improve yourself for playing time and you don’t bail when something doesn’t go your way.
Growing up in Canada and playing travel hockey I was always wanting to be pushed. Would rather be the worst player on the best team and improve and earn more playing time than be the best player on the worst team where you really don’t have to work at it.
The AD said it was your decision but the people who matter most have spoken(the kids)and these parents need to be taught a lesson as well.
You choose that for the year and you stick it out and next year play where you want.
Best of luck to you