Why did communism always turn into a kind of dictatorship?
Afaik this happened with every single instance of a communist country. Communism seems like a pretty good idea on the surface, but then why does it always become autocratic?
The same threat that democracy faces, it's vulnerable to charismatic people who become entrenched and draconian. I'm not convinced it can ever work without some competing force that resists the consolidation of power, such as highly educated and politically involved populace.
Communism probably works at smaller scales but for larger populations it would only be feasible when the leadership is benevolent. A robot administrator would be an interesting experiment.
This is strongly supported by Wengrow and Graeber's "The Dawn Of Everything", though I think they would say that in the case of state communism, it's bureaucratic power/control of information, rather than charismatic power. I think charisma is more relevant in fascist dictatorships (which I guess some communist systems evolve into).