I am just saying Sakura was hated from very beginning of anime and that was time when I and others were kids and Naruto was very popular so we were discussing everything and played ninjas. I know who was their favorite and who they hated and reasons for that. Everyone hated Sakura yet none of them because of the reasons you said.Sakura s character development continued till around 17+. So to like a girl is not necessarily limited to an age limit. I have your word to go on so what is it's worth? I'll have to trust it since I can neither confirm nor deny.
Anyway the reasons I gave are the rational conclusion on the most likely reasons somebody would hate a character.
I don't have hate for Sakura so I'm not in need of help thank you for the advise though. It may benefit many others.
Of course I can't talk about my online friends because I don't know them in real life yet I never heard someone saying that as reasons for hating her.
I am not girl so I don't know about their reasons for hating her, I only know that my sister likes Sakura.