Why the hell do all say Sakura is useful and support Hinata??
Seriously WHY is Sakura useless and Hinata not??
Even if Sakura were useless Hinata would be even more useless!!!!!
And if we go through useless scale there are many (most) before sakura!
Your grammar is extremely poor. Anyways, let's go through a list.
1.) Ino. She is capable of precision teamwork with Shikamaru and Choji. She's a great fighter who can swap bodies at perfect times as well as heal.
2.) Hinata. She is a badass taijutsu fighter with the bloodline limit of the Byakugan and has a near 360 degree perfect defence. She can also perform the Eight Trigrams which increases her speed and strength, allowing her to make blinding strikes with strength to destroy even boulders.
3.) TenTen. She's part of a team of some of the greatest taijutsu ninjas in the Naruto Universe so ultimately, she is also extremely talented in hand to hand combat. Not only is she a pro at hand to hand combat, she's an expert at long range, has an arsenal of weapons on her at all times, extreme capability of summoning jutsus and ability to lead a team on succesful missions since Gai, Lee and Neji are always distracted by competing with each other.
4.) Temari. Despite being from the Sand Village, she has shown up to fight along side the 4 other teams of the girls Sakura, Hinata, TenTen and Ino. She's a pro a long distance fighting, capable of leading large teams with precision (being the kage's team member and assistant) and capable of performing multiple summoning jutsus with a superb control over the wind element.
5.) Onto Sakura... Brute strength and the ability to heal... She is incapable of running a team properly, she has excellent chakra control but lacks any jutsus to even use along side that chakra control. Her hand to hand combat lacks compared to the other females and is always stuck on some sort of drama while not acting on any other whim for the sake of her friends. She merely sits there and screams for Naruto's name such as when Pein attacked the village. Really, Hinata even went out to fight Pein to protect Naruto. What did Sakura do? Oh, she sat in the same spot since when she called Naruto's name.
Sakura is a good strategist and remember that Byakugan has got a blind point so if sakura uses her brain and strenght together she could beat Hinata easily...
Naruto needed the help of the fox in order to beat Neji. Both Hinata and Sakura have excelled during the past few years but Hinata has been out on more missions so her combat abilities have increased further then Sakura's due to the fact Sakura became Tsunade's assistant and helped around the hospital and decreased combat performance.
So in short, no, the is no way on Naruto Planet that Sakura can locate the blind spot, aim a missile object at the point and have the trajectory so perfect that it will hit Hinata. Furthermore, the only way Sakura can hit that point is by using a kunai which is small enough to go through that space. If Sakura lunged in through that point, Hinata would pick her up instantly due to size. And even furthermore! One kunai hit on Hinata's back will hurt her. Besides that one kunai, Sakura has already been beaten to a pulp with the Eight Traigram jutsu.