Earlier quoted context omitted.
If you think Leninism is Marxism, you are a dupe of Leninist propaganda.
Ah, yes. "No true Scotsman". Nope, not going to play that. Edit: At this stage, enough so-called "Marxist" governments have descended into slavery, starvation, and mass murder that the burden of proof should lie on those who advocate such governments, and that burden should be heavy indeed. But nope, it's always "but that wasn't REAL Marxism". After a century of trying, with dozens of attempts, it is quite clear that…
Refusing to back up certain or all interpretations of an idea by no means amounts to NTS.
You're making a fallacy by saying that these problems you mention are core to Marxist thought. Modern Marxist philosophers are almost dedicated to finding flaws in 20th century Marxist implementations, and doing research on other models such as anarchism, post-left anarchism and technocracy.
Dismissing this research as "lol no true scotsman, not playing that" is incredibly ignorant and facile.