why do people hate on osu!mania??

[mrdawn2]

everywhere i look on forums people just hate on osu all the time?
why hate? it has lots of good things like a automatic rating system (star rate) which current sm 5 does not have nor ffr
it also has a nice leaderboard system which are counted off pp which is very well maintained and is still is gonna have a massive overhaul to make it even better.
together with having lots of different types of maps (from one to ten keys!) i dont see any reason to dislike it.