Wherever there is a smart and successful person, there will always be a dumb, flailing asshole looking to bring them down. Case and point: the Lena Dunham backlash. Since Dunham first made her splash into pop culture with her hit HBO show, Girls, and now her new book, “Not That Kind of Girl,” she’s had many haters. (In the words of Lena’s bestie, Taylor Swift, “the haters gonna’ hate hate hate hate hate.”)