You pony fans are missing the point, for the most part people aren't saying the show sucks (like you are with family guy), they're saying the fans are SOO ANNOYING.
If you're an adult that likes to watch kiddy ponies prance around, that is not something socially acceptable to tell everyone on the internet. No one understands it. "Hey i'm a 24 year old guy but i surround myself with pony pictures! everyone else join in!". Where I'm from you'd get beat up.