On more than 30 occasions, the United Nations Assembly has discussed the blockade against Cuba, which costs the island 5 billion dollars annually, according to some estimates. Every year the resolution is proposed and the whole world, through the vote of the absolute majority of the member countries of the United Nations General Assembly, has condemned the imperialist attitude of the United States towards Cuba.
Blockading Cuba has never made sense. If communism is an inferior failed system that can't compete with the freedom of Capitalism (cue heavenly sunbeams and angel choirs) why not leave Cuba alone and let nature take its course?
There was a somewhat understandable reason initially; when the embargo was first started, it was because Cuba allowed the UUSR to use it as a forward base for missiles so they could reach the mainland US, which, understandably, the US wasn't very happy about
But ever since the fall of the USSR it's been absurd
Because the US knows communism is not an inferior system. But to run the argument it never works they need to embargo it to then say "see it doesnt work".
That's really it. The start and end of why the embargo is even still there. It hurts both Cuba and (to a lesser extent) the United States. It benefits nobody, but there's some loudmouth Cuban expats who want you to believe Batista didn't have it coming.
This is why you get conspiracy theories that it was Cuba that assassinated President Kennedy: how else can we justify such extended sanctions when all the participants are long gone