In a vacuum sure, but the communists replaced Batista, who was arguably as bad or worse at the time of the revolution. In the long run they'd have probably been better under Batista because being America's bitch is better for the health of Caribbean nations than being the bitch of USSR/China and the enemy of America while you haul your goods home in a donkey cart like it's the 19th century. But it wasn't knowable at the time the die was cast.