You seem to base your worldview on reading a bunch of people's brainfarts and saying
"these guys sound pretty smart, let's overthrow everything and put their brainfarts into action."
This is not how science works. Science is more difficult. Economic science - the dismal science - is a lot more boring than reading someone's speculations and marveling at how clever they sound. If you think that economic science is not scientific enough for you, then how about the left start a true economic science, with more scientific rigor?
But it's not about that.
You have a brain stuck in the stone age - the same brain God crafted for Adam - and the modern world makes no sense to a stone age brain.
This is why so many people love sports, riots, sports riots, criminal gangs, gang warfare, cliques, mobs, jocks, cheerleaders, and general stupidity. It's all primitive violence, the scale and patterns are similar to stone age warfare. It comes naturally to people.
In the stone age, every social problem could be solved by whipping up a a mob and launching it at the unpopular person. The stone age left keeps doing this. They don't care that it's ineffective. They only care that it comes naturally to them, and it feels natural.
In the stone age, all economic problems could be solved by whipping up a mob, going after a successful tribe, and stealing their stuff. It comes naturally to people. Leftism comes naturally to people. That's the only reason leftism persists, not because of any successes.
The stone age world you are trying to recreate is one of total bigotry - racism to the point of "
you're from another village more than a mile away, so I'll be a hero for murdering you". Not because people were eviler, they just couldn't organize a peace process with their primitive political and economic systems. The same primitive systems you are trying to bring back.
It was not an eco-utopia of wisdom and restraint, stone age people drove to extinction half the species of large animals they came across. Maybe they were wise enough to know what was happening, but they could not stop the slaughter with their primitive political and economic systems. The same primitive systems you are trying to bring back.
In the stone age technology barely ever advanced at all. Stuff like rope took forever to be invented, and forever to spread. Nerds who invented stuff got no respect. You had to be a jock or a cheerleader. They probably knew that they should invent more stuff. They probably knew that they needed to support the nerds who invent stuff. But they couldn't have research and development departments with their primate political and economic systems. The same primitive systems you are trying to bring back.