Sakura haters said that she was a b*tch until Naruto started becoming stronger.
Her small flashback of Naruto's first fight against Sasuke as kids is making me think the contrary. She actually seems to feel sorry for Naruto and is not mocking him or fangirling Sasuke. Maybe she connected with Naruto's wish to be acknowledged by others and especially by sasuke.
Well you can throw this movie in Hinata lovers face, Sakura was clueless to Naruto's pain, but once she became aware, she was her strongest supporter, willing to go against Sasuke and quit the Chunnin exams so his dream didn't die. The trailer hints at Hinata knowing how alone Naruto was, and how he was treated but she was too weak to do anything, she left him to his own devices and never gave him a person to rely on, because she was too weak.
So Sakura haters, (who 99% of the time also love Hinata) should be really proud to know their princess chose to ignore the hero's pain, our princess was hindered by ignorance to the Hero's pain but has supported him more than anyone else since she's come to understand it.