But, your point still stands. The flavor of socialism encountered in the Eastern Bloc from post-WWII to the 90s was by all accounts completely dysfunctional.
Most countries with material wealth that are advertised as being "socialist" or "social democratic" are actually bog standard capitalism, perhaps with a marginally better funded welfare system than average.
Or one could go further and actively prosecute people who try to do anything "capitalistic" (e.g. offer services for pay). That is the model that USSR, and all countries in its sphere of influence, used.
Encouraging individuals or groups to have their own notions of who owns what seems like a surefire way for warlords & petty tyrants to take over local economies.
There is a book by Ursula Le Guin, "The Dispossessed", that describes an utopian (to some extent; the book subtitle is "an ambiguous utopia" for a reason) anarcho-socialist society. Anarcho-syndicalist, to be precise. It's fiction, of course - but if you wanted to get the gist of how people who believe in this sort of thing imagine such a society would work, it's a great introductory crash course; kinda like "The Moon is a Harsh Mistress" is for ancap.
I disagree with that statement, because capitalism is just a market and markets arise and behave the exact same way whenever and wherever they are allowed to. "Implementing capitalism" isn't a thing you do: it means that you stop doing something (suppressing market activity).