> A "critique" that seems to have never really "worked yet" or burned itself out every time?
You've probably been duped by Leninist propaganda into mistaking Leninism and its descendants for Marxism (and, moreover, apparently the sole actual Marxism.) Leninism is, at best, a radical revision of Marxism in a attempt to erase the prerequisite for a developed capitalist economy with broad working class class consciousness.
The actual place Marxism, and not radical revisions like Leninism and its descendants, has had an effect is throughout the advanced Western states where capitalism -- the late-19th Century system critiqued by Marx -- was universally dominant, where it formed the core energizing various movements against that system, including particularly the labor movements, resulting in the replacement of the capitalist system Marx critiqued and the emergence and then dominance of the modern mixed economy, which while certainly not the end-state Marxism was directed at is clearly comprised of steps in the direction Marx called for.
