I am not even a fan of Naruto, but the way she treats Naruto even when he just saved her useless ass, it really ticks me off. The least she could do is to be nicer to Naruto.
Many people thinks she actually injure him when she hits him. Why? That's beyond my understanding...What are you talking about? What did she do? I hope you realise the comedic relief of her hitting him in various ways doesn't actually hurt him as he recovers in the next panel. It's supposed to be funny and i'd believe you don't read the manga at all if you think she is mean to Naruto :x
Also if you are talking about the part when she gets the seal and she taunts him she was taunting both him and sasuke as a joke about the hokage thing. Those are the only two occurrences in the war i could see as being mis-interpreted