If you don't like the leadership, there are plenty of other ways to improve that, but talking is the cheapest.
Gee, the authoritarian brainwashing really is strong with you.
Quoting you:
> Actually discussing the leaders doesn't do anyone any good.
So: No, I didn't.
> Changes cannot be achieved by simple talking.
Yes, they can. And are. Constantly.
> You have to complain and do things if it doesn't work.
No. For one, many things can be changed by talking, and talking only. But also, there is absolutely nothing wrong if someone only talks about things being bad where action besides talking is required to change things. It's neither morally wrong, nor is it useless, if your talking is what enables others to implement the changes.
What actually is completely useless is complaining about people only talking about a problem. Absolutely nothing useful can possibly come from that. But it's a common fallacy used by authoritarians and parroted by their followers, nothing particularly special to China. Which is the general impression I get from a lot of your arguments in this discussion: Tons of typical authoritarian fallacies the likes of which you would also hear from right-wing nationalists in "western countries".
I think everyone has different definitions of freedom, some might think it only means to be physically free but lack of free speech and lack of proper human rights are a-ok because they don't know any better.