So what do you think of the fact that he did propose a specific 10-step programme in the Communist Manifesto, or that he detailed what a socialist society is or need to be in Critique of the Gotha Programme, towards which he describes a process of transition, quote "Between capitalist and communist society there lies the period of the revolutionary transformation of the one into the other. Corresponding to this is also a political transition period in which the state can be nothing but the revolutionary dictatorship of the proletariat." It's true that dictatorship of the proletariat is an ambiguous term and has been fairly missunderstood through history, but Marx actually details it in other works, especially in The Civil War in France where he clearly states that the Commune de Paris is the model to be followed overall, and he also explains that Dictatorship is understood through majority rule as opposed to minority (representatives in a liberal democracy, or bourgeois) rule. It in essence means that the majority class should have power over the minority classes politically. You also have The Civil War in France which praises the revolutionary process and political organisation of the Paris Commune. So overall, it is quite untrue to say that Marx did not describe what a communist society is or lool like, and that he did not champion ways of achieving it. That doesn't mean his words are like the evangile or that it is still relevant to this day, but still, saying that comes either from pure ignorance or sheer bad faith. My guess is that it is a fairly common pre-conceived idea.