Again, you can believe yourself to be anti-capitalist, but simply calling yourself one is not an adequate explanation for opposing proletarian state power. Further, you can absolutely find criticism against the CPC in China, and the west also censors to a dramatic degree against the proletariat. Censorship is less transparent and more malicious in the west.
Not all dissent is capitalist. What's absurd is pretending that all criticism is censored in China, which is why I have been repeating over and over that you have no grounds to stand on to criticize China. You have no idea what China is like, just what you hear online, and as a consequence you have an utterly one-sided view.
As for imperialist countries not developing further, it's because imperialism results in de-industrialization. The plataue for capitalist development was already reached, you need to transition to socialism to begin developing further. You continue to ignore real, material systems like imperialism, because you simply disagree with analyzing it as a stage in capitalism and instead wish to analyze it purely as a policy states take. This is not how imperialism works.
Really, it's quite disappointing that this is what you seem to take away from this. You have a view of China that doesn't map to reality, and you have a view of imperialism that doesn't map to reality either. Without analyzing both concretely, we can't really move forward.