Well he should, it would be a good lesson for him.He was too arrogant,was very rude to her and kakashi. A lot of fapboys said ''He was merely stating the truth when he said Sakura is useless''.I bet they don't have much to say now (they're going to say that Obito is the saviour but admit it he needs Sakura's help ).
When dobby saved harry potter's life in the Harry potter series it was because JK rowling wanted to show that ''even the littlest creature can make the biggest difference''. Sasuke should have not have said that Sakura is useless because she is helping to save him now. So like i said ''even the littlest people can make the biggest difference''.Kishi is playing along the same lines as JKR.
Never underestimate anyone.It's the same as Konoha people underestimating Naruto becasue he was failing at the academy and today he is the hero who is saving the world.
I think its time people stopped trashing Sakura.Their precious Lord Sausage can't get out of the desert dimension and will get roasted nice and tasty without Sakura's help.