Cuba was owned lock, stock and barrel by the mob and corporate interests. 
Castro would never have been able to win without the support of the majority of the people. 
 After the parasitic French Elite were kicked out of Viet Nam the government there adopted the US constitution but the western military combine moved in to "restore order". 
Castro had no intention of turning to communism. After CIA invasion and multiple assassination attempts as well as a complete embargo, Cuba had no choice but to turn to Russia.
And no I do not believe in Dictators, Communist regimes or even heavily controlled socialist states.