Look at it this way, guys… at least her reason as being a villain was better than Jack Frost from that horrible 2006 Christmas movie, which is one of the laziest Xmas films (and the worst of the Santa Clause series) in my opinion. Sure, she wasn't as friendly as some other villains at first, but she got her act together and matured. In that Santa Clause 3 movie, Jack Frost's reason for being evil was pretty pathetic and stupid, compared to Starlight Glimmer's.

Disclaimer: My Little Pony: Friendship is Magic belongs to Hasbro and Lauren Faust.