You mention how the Trots in China failed to identify the primary contradiction. In 2023, I feel like they make the same mistake. The principal contradiction right now is the one between imperialist and anti-imperialist spheres. And by going against China and other AES states and supporting the line of the imperialist powers, they are repeating the same mistakes (at least this seems to be the majority of Trots, seems like there are plenty that do not think this way).