Why “Girls” got so dark

The second season of “Girls” is over now and despite being at least as controversial as the first, I think one way to understand it — one way to understand how it went from being a series about messy, lost, privileged but relatively normal-grade New York City chicks to something much more difficult and heightened about not-so-normal narcissists and basketcases — is to think about it as reaction to the intense vitriol and passion directed at the first season. Especially the vitriol.