Scootaloo has just noticed the difficulties of being a child. Like if a grown pony does something wrong, then she has no right to criticise. But if she screws up, then everypony has the right to criticise HER. Also, when under the authority of others, supposedly grown ups, she can't do anything she wants without permission. Adults also happen to think children are naive beyond compare.
It's almost as if they forgot they were children themselves!
Now, that she's noticed it, she must live with it, if she doesn't rebel first.
Chapters (1)
I always thought that the CMCs were portrayed as a bit too grown-up in some fanfics. That said, Rainbow Dash is somewhat unusual in that I can't imagine her taking constructive criticism about her routines from anyone except, possibly, the Wonderbolts. So, Scootaloo is, in fact, in a very large group of people that RD simply doesn't listen to.
Wow, squirting a child for saying "Your move didn't look right, but it's still cool" makes you a first class bully.