Well, I think the author in the link is not talking about the Communism/Socialism you experienced.
He seems more like a anarcho syndicalist/communist.
I am in the free market anarchist/mutualist camp (not anarcho capitalist!) but I understand where he’s coming from.

Today’s problem is, we have Socialism for the rich.
Elon Musk is a genius but would he have succeeded without government subsidies and all the CO2 credits Tesla sells?
I doubt it.
Tesla is losing money on every car but the company is profitable because they can sell all their CO2 credits.

Intellectual property is another topic which keeps rich people/countries rich and poor people/countries poor.

I doubt there are still soviet style communists out there.
Most people see communism in the form of David Graeber’s “everyday communism”.
Lot’s of early 20th Century anarchists like Benjamin Tucker called themselves Socialists.

The Wobblies (Industrial Workers of the World) also call themself socialist.
But they have nothing in common with soviet style communism.

Or checkout the Mondragon Corporation this is the type of ‘Socialism’ most people would prefer (me too).