They’re not extraterritorially enforced unless you’re talking about a blockade, so unless you’re a Cuban or Puerto Rican, you can’t complain. Most sanctions are just one nation deciding it prefers to lose your business than to lose its security agreements with its allies. If you find yourself unable to make a cross border deal, it’s because your country was unable to negotiate it with another. I have no intrinsic right to do business with anyone in the world as I see fit. Neither do you. I’m just okay with that because there are bigger goals than my own.