Too much of everything (spoilers)
I would have enjoyed this way more, if the main (and only) theme was the cutthroat ballet business and the struggles and injuries and sacrifices of the dancers (and the asshole teachers and AD's). But gansters, strip clubs, human trafficking, incest... nooo. Way too much stuff, this just became a big mess with no good focus on anything.
Black swan was superb, and this just came nowhere near to it in quality, sorry to say.