Its like Hillary walking into a working class kitchen for the first time.
They've been shielded from even critical support of China and other AES for so long they literally, not figuratively, literally cannot process that people exist that have beliefs that aren't Reddit Approved. They immediately assume it's bots or wumao. Human beings can't possibly hold these beliefs, so they must be Oriental hordes or actual robots.
Does Cuba have billionaires? Does Cuba have hyper market capitalism? No. Cuba actually progresses towards socialism, China might improve quality of life (for the Han majority at least) but they're clearly not aiming for socialism. And yeah, China's far more oppressive and authoritarian than Cuba, that sort of thing isn't compatible with socialism.
Do you think if the Cuban revolution had somehow actually happened in China it would have progressed as it had in Cuba?
Accomplishing rapid growth in the quality of life for hundreds of millions of people is a much different task than doing it for a few million and in a mass of land much larger while located such that it cannot be blockaded and pushed around by the US.
Why is it that you cannot critically support the Chinese struggle for socialism?
You would not meet much overt disagreement in saying that the situation of workers in factories is something that must be improved or that there might be questions of state control or rigidity with regards to Uyghurs or LGBTQ+ people. The difference is you seem to ignore why these things may be occuring or dismiss the many achievements of the revolution thus far because there are still areas requiring attention. It is clear that the situation for these groups are improving as well, both as a part of the entire Chinese economy and in their individual qualities of life while the same cannot be said for many people of the world.