Marx never specified how “country-wide implementation” should look like, Marxism-Leninism was the most common one. Escaping capitalism in today's world is impossible because the moment you decide to work on different economic model and distance yourself from IMF you'll sign your death sentence. Big players will never allow that.

a worker owned cooperative is the very definition of the workers owning the means of production, so i responded with marxist examples to your comment.

you assume that a country-wide implementation is the only way that marx's ideas can be implemented and that is a wrong assumption.

if organizing as cooperatives was the most common way to structure businesses (rather than a capitalist organization), then you'd have a different, arguably better society. in that situation, you can organize as a capitalistic endeavor if you want, but you'd have a hard time competing with co-ops for labor and other resources. it would be decentralized, entrepreneurs would still get rewarded, there would still be free enterprise, it would be a free labor market, etc.