Implementations of Leninism did, sure, but (deliberate mislabeling aside), I'm not sure what that has to do with Marc, since Leninism rejected the preconditions Marx laid out and altered the approach to address the changed preconditions.

Leninism is farther from Marxism than the near-universal abandonment of the system Marx named “capitalism” for modern mixed economies (which, to be sure, is still pretty far from Marxism), so if you are going to blame Marx at all for the failure of the former, you have to credit him at least as much for the success of the latter.