They’ve had it.
They’re fed up.
It’s not the kids; it’s the parents.
I don’t have to explain this to you. You’ve seen it, as I did when I took my daughter to her first game of sixth-grade basketball only to be confronted by moms in the stands screaming abuse at harried referees while dads paced the sideline shouting commands to their kids that drowned out what the poor flustered volunteer coach was trying to say when they weren’t contradicting her.