We've come close a few times, but assholes from outside have stepped in to crush them.
The Free Territory of Ukraine existed from 1918 to 1921under the loose leadership of Nester Makhno. The Bolsheviks under Lenin crushed it, because actual communism was a threat to their authoritarian ideals. Even so, It wasn't quite at the level of true communism.
Catalonia in the late 1930s was actually close to true communism, and saw massive increases in the standard of living and overall production, until the Fascist dictator Franco won the Spanish Civil War with help from Hitler.
It's a running theme. Every time the people saw enough of the bullshit, fascists and authoritarians jump in and try to seize control again.
In the slow times between the fascists and authoritarians committing violence against the left, bootlickers spread lies and pro-capitalist propaganda, even when they don't actually understand the words they type.