Because of the lack of abilities, Sakura was a burden on missions. She had to cry out for help. She would complain that she felt like a burden, but you would rarely catch her training by herself like Naruto and Sasuke. Sasuke and Naruto both had clear goals for themselves, while Sakura lacked any.

Why does Sasuke hate Sakura?

Sakura was reminding him of his bonds and feelings of love and companionship once again. And this is also why I believe he placed her under such a shocking genjutsu- he wanted her to hate him. Sasuke needed her to stop loving him so he could become the “object of all hatred” like he desired.