When Castro took power in Cuba the people cheered because they thought that everyone would be equal and would want for nothing.
But Castro's government failed to run the economy in a rational or efficient manner, and Castro discarded democracy, using the military to maintain power. Many rights and freedoms were lost because only with coercion by force could Castro's socialist ideal be maintained. So everyone suffered and continue to suffer, and most of them have no way to escape this hell.
A few have managed to escape. One survivor, describing conditions in present day Cuba, said, "You don't see any future. Everything is stagnated. Health care, education—nowadays they're in ruins."
"[People who support socialism] should wake up," says Gloria Alvarez. She is from Guatemala and says, "I've seen the impact of socialism. My father escaped Cuba. My grandfather suffered under Communists in Hungary before escaping."
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"As a child, I was taught to mock socialism," she says, "but democratic socialism sounded OK. It made sense that government should take care of the economy. Then I watched democratic socialism fail in Venezuela, Brazil, Argentina, Bolivia, Ecuador, El Salvador, Chile, Nicaragua, and Uruguay. I learned that every time a country started down the socialist path, it fails."
https://reason.com/archives/2018/10/10/socialism-destroys