Almost nobody believes the West is perfect (or any other system) is perfect.
Shoot - I'll bet you could get a lot of people to buy into an authoritarian system that maintained peace.
But the issue of Han nationalism which extends to the extermination of Tibetans, to the incarceration of 100's of thousands of Uighers etc., to the total lack of democracy ... combined with the fact that the system is still hugely corrupt ...
I mean, it would be one thing if China were at least a well ordered machine, but it's not, there's corruption from top to bottom which completely undermines any legitimacy in whatever 'system' they have.
Summary: 1) Nobody really thinks any system is perfect. 2) Most people would prefer the rule of law, basic democracy, and low levels of corruption, and at least basic human rights. Those are almost universal.