She is my bias since Izone and I understand her fans were traumatized by Otr's treatment of Sakura. But I think they are a bit exaggerated in complaining. Please, Sakura has signed an exclusive contract with Hybe and of course she made an agreement that is beneficial to her so she agreed to move to Hybe. They treat Sakura like a child when she is very vocal about something she doesn't like even since Izone and it's impossible for Sakura to keep quiet if she doesn't agree with Hybe let especially after this special contract.
They complain about small things like Sakura's hairstyles which is not bad at all. And after this cb, for the first time Sakura got a lot of lines since her debut in Korea, they complained again. For me as a fan, everything needs time especially since Sakura already told that she is not too confident with her vocals and still trauma from all the critism she get. And when everyone are happy for her, as usual her chinese fans started to complain and make her other fans follow their step too while it's not an issues at first. Yes, her C-bars contribute a lot in sales and they have right to complain yet it's basically over nothing.