If they had true agency the US would drop the sanctions and let them do as they please. Unfortunately the US loves to have a finger in every pie, and blaming the local population isn't the answer.
The embargo is not responsible for Cuba's repression of the press, their repression of political dissent, their single party political system, the unchanging leaders from 1959 to 2018, or of Cuba's government own mismanagement of things.
No one is talking about blaming the Cubans for their woes. We're talking about the right and capacity of the Cuban people to rally against their own government if they wish.
I feel like I'm talking to automated talking points bots.
Please don't accuse me of being a bot just because my unstated priors are different from your unstated priors. It's really poor for the conversation and for every interlocutor.
This is quite an assumption, and if it's true, it's only because those who disagreed with the regime have already been killed or leapt into the ocean to perish or prosper in Miami
It's not an assumption, there are polls with approval ratings for various political figures from even western institutions that show that approval ratings 40-60 are the norm. It's possible that the approval has decreased due to the crisis, but that's not unique to Cuba and if it is maintained it's plausible for the president to change.