I'm not quite sure how to reply to that, because you make some good points. I flatly disagree that communism can't work. It's like saying Capitalism couldn't work because for a whole century the French revolution was failing before 1789. Which is not even the first humanity's attempt for a capitalist system, but the first well known one. We still have ways to go and failed attempts to try to get it right.

However, the most important thing in my eyes is to learn from the past. Being in a country that was surrounded by communism, tried, and was refused help from the then socialist states, I know very many people that still look back to those times with fondness. From my country and neighboring ones that were parts of the socialist block. But all those implementations had their problems and these same people would be the first to admit that. Our job is to go through all that history and judge it with clear heads, see where it went wrong and how or why, so in the next attempts we'll fail in a different way, until we get it right. Similar to how every socioeconomically system did so far.

I don't care about Anarchy or Socialism or Trotskyism or whatever, as long as it gets us to the end goal of a classless system without economic or power elites that see us as data nodes to profit off. Each of those approaches has its pros and cons and there are many others as well.

But saying it failed so we best move on, because the first handful of attempts went wrong is not going to bring any change whatsoever.