No one should really hate fictional Characters, that is just disturbing. But nevertheless I just have disliked the Character ever since Part 1.
Her personality is just boring. Her fan girl crush on Sasuke was just annoying, and it is not because 'I hate Sasuke' or a Character not allowed to like another fictional Character, it just that was one of the purpose for the Character's personality. She also constantly whined about something... it is hard to explain, there is nothing good I can say. She is also the Orihme of Naruto, when she needs to be saved.
Part 2, she was ok and I didn't mind her, until it went to the Five Kage Summit Arc. She thought confessing her love to Naruto would stop him going after Sasuke, not thinking that Naruto wanted to save Sasuke, because he is his friend, not because it was about her. But either way she finds Sasuke, and after that point the Plot was so predictable. It was obvious that she wasn't going to hurt Sasuke (even she had the power to) let alone kill him. It was also obvious that she was going to be saved by either Naruto and Kakashi.
In the middle of the Kakashi and Sasuke fight, she interrupts trying to kill, only to be stopped by Sasuke, then saved by Naruto, predictable again.
IMO her personality is just terrible for me.
But the whole that I stopped me from giving a f about this Character is when she said "I don't know who to save first, Naruto or Sasuke" I can't remember what arc she said it in, or if it was filler. Her Fangirl crush turns into love? A Guy that she didn't see in two years and when they do met he wants to kill her etc etc. But after all the times that Naruto has helped/saved Sakura, she doesn't know who to help.
But after all saying that, she isn't barely in the Manga that much anyway.