Lenin was one of the earliest theorists, organizers, and eventually the leader of the first explicitly Marxist revolution in world history. Any one of these accomplishments would make him one of the most important and admirable Marxists ever, but all three?
Lenin’s worst mistake was giving too much of his health to his nation. Sorry, but your reading is not supported by the historical data, even though it is so often repeated by the western left.
My man Freezy E wrote the best introductory texts to Marxism which hold up to this day,a taxonomy of the family and how it’s shaped by the mode of production and hardly anyone ever mentions him unless it’s to acknowledge he bankrolled Marx.