Memes

I'm not saying that imperialist aggression didn't / doesn't contribute to the collapse of socialist states - it most certainly does - I'm saying campists tend to get tunnel vision and think that it's the only reason they fail. Cuba has actually been quite successful at enduring in spite of imperialist aggression, and I think there's a lot of benefit in asking what it is they are doing better than past socialist states. In my opinion the answer lies in the fact that their governmental structure is far more horizontal in comparison to other attempts at socialism such as the USSR, and that has resulted in policy that is far more responsive to the specific material needs of local communities within Cuba. Contrast the USSR in which the pseudoscientific beliefs of a central authority figure turned what could have been a brief and localized food shortage into a full-blown famine spanning the entire union.

With regard to China being state capitalist, I skimmed the essay you linked well enough to see that it does not address the anarchist critique of state "socialism," namely that state ownership does not truly constitute collective ownership because the state is a hierarchical institution that centralizes decision-making power in such a way that the will of the people affected is often ignored. Don't get me wrong, I acknowledge the undeniable successes and advantages of central planning when compared to the neoliberal method of not planning at all beyond the fiscal quarter, but those are not the only options. I believe that horizontal planning is superior to both, and is the only way for an economy to be truly socialist in character. Examples of this being done can even be found in the revolutions that created the USSR and the PRC before they seized state power. It's also not a discrete binary; there is a spectrum between totalitarian dictatorship and full horizontalism, and the projects which are most successful tend to veer towards the latter rather than the former.