Basically he believes China is revisionist and capitalist, and the failures of socialism thus far have been through revisionism (the failure to adhere to core marxist principles). He also doesn’t cover many liberation movements that don’t fully fit the communist/marxist ideal he supports.

IMO this view obfuscates some of the more material sources for why movements fail, most notably in his viewing the failure of the CPUSA not through its history of settler communism/labor zionism but its failure to adhere to marxist tenets leading up to the open revisionism of CPUSA’s Eric Browder, without seeing why his revisionism was so accepted and popular. This leaves praxis to adhering to a closer marxist orthodoxy that’s quite dogmatist instead of using the dialectical materialist analysis to see that the material basis for a revolution in the USA would be the superexploited native and black peoples that aren’t represented in the CPUSA or even most other communist groups.

I remember him receiving a question on a stream once about covering the black panthers and he said he preferred not to because he didn’t like the kind of work they did or something to that effect, so he’s kinda got a big blindspot there and I would suggest you try and find some audiobooks of Gerald Horne and Frantz Fanon’s works, would also suggest Assata’s autobiography, Revolutionary Suicide, Kwame Ture’s Black Power, Red Nation Rising just to name a few. Also educating yourself on China through a seperate source I’d recommends Roland Boer’s “Socialism With Chinese Characteristics: A Guide for Foreigners” if you can find an audiobook “The East is Still Red” is also good, or even just reading the works of Deng/Xi Jinping for yourself, unfortunately a lot of the history and study here is in Chinese lol but I’d avoid S4A’s content on the topic personally.