I treat all countries the same way, my evaluation of them changes depending on the country.
As for your critique of China, surveillance, suppression of misinformation and capitalist viewpoints, etc. are directed against capitalists. It's a working class state wielding authority against reactionaries. The west also uses state authority against class enemies, it just so happens that these class enemies are the working classes. Opposing socialist democracies is a reactionary viewpoint, even if you consider yourself to be anti-capitalist you'd still be going against both the will of the majority and the working classes.
As for imperialist countries, they aren't generally improving. The reason for this is dependence on imperialism, and putting profit over need. They cannot effectively improve the lives of their people. This isn't me treating them differently, but instead evaluating them based on their own (lack of) merit.
As for China being "violent and aggressive given the opportunity," this is silly and unfounded.