You know, it's because of her growth up til now that I've come to actually like Sakura. You call her useless; why? Can you tell me some good reasons, aside from her lack of screentime or the fact that she hasn't surpassed Tsunade yet? Not trying to step on anyone's toes, as I'm really not that fond of Sakura, but really: are you forgetting she hasn't had the same level of motivation as Naruto and Sasuke?
Naruto has gotten stronger to not only have people acknowledge him, as was his original goal, but also to save Sasuke, as well as the rest of his friends, fulfill promises he's made to his loved ones and ultimately to uphold peace/try to create peace. Sasuke, meanwhile, had something driving him to become strong and cunning from a very young age. He was led to believe it best to kill his brother, and so he trained constantly in order to grow stronger so he could one day take down his brother and avenge his family. He even chose to betray the people he cared about, break his bonds with them supposedly, in order to obtain power. And he did.
After the truth about Itachi was revealed, Sasuke got a new drive: anger. Pure hatred that, at one point, had driven him absolutely mad. He became evil, truly evil, but he had also become even stronger because of his desire to crush the Leaf. Even if he didn't gain strength for the right reasons, that doesn't matter.
You hear people say Naruto has surpassed Jiraiya and Sasuke has surpassed Orochimaru a lot; you don't hear them say the same thing about Sakura because she hasn't yet. She hasn't had the drive behind her, pushing her to. The reason to work so hard. But the fact that Kishimoto threw that in, especially so early on, means that there's a very good chance it will end up happening. So please, be patient and wait before you go bashing a character. The manga isn't even finished yet.