The Cuban revolution wasn’t socialist, it was one for independence. The guerillas, once in power, were eyeing vaguely DemSoc politics and a good relationship with the US. The US answered with the Bay of Pigs invasion etc, driving Cuba into the arms of the Soviet Union and acquiring an unhealthy habit of authoritarianism and non-industrialisation in the process, becoming dependent on the block overpaying for their sugar, them underpaying for oil, fertiliser, etc.

This is somewhat inaccurate. The guerrillas, once in power, were a broad coalition, but the Castro brothers and Che consolidated power under a ML-leaning regime, and despite claims otherwise to some of their less ML compatriots, this seems to have been the plan more or less from the start. Several of the revolution’s leaders were executed for not being ML-leaning. The Bay of Pigs invasion occurred only after that.

This is not to say, mind you, that US hostility didn’t drive Cuba into the arms of the Soviets - it very much did. But that hostility was before the Bay of Pigs invasion, and the idea of a demsoc Cuba was dashed by the very men who freed Cuba from Batista.