What's wrong with instagram?
Do you not like it because pictures posted there have been manipulated or maybe privacy reason?
I don't like it because...
All the effects look the same
It makes everyone think they are a pro photographer
It somehow inspires people to photograph everything (cereal boxes, road signs, etc)
And the borders drive me crazy. I can't stand the borders.
That's just me though. I realize it's a hugely popular app that several other apps now imitate. I realize it was worth enough for Facebook to buy them, etc. I personally can't stand it but to each their own.