I don't think you read Marx, because what you're saying about his work ain't true: he absolutely had a systemic thinking and within it for sure perfection could be achieved, by means of superceding the division of classes. Nevertheless, most people who cite Marx didn't actually read Marx, but a rehashed version from someone else. Or perhaps only a small, incomplete, subset of his work, from a very specific perspective. Marx's writings in particular have been falsified many times, for a multitude of reasons.