Cameron, I'm sorry to hear of your family's experience, and I don't consider it a reflection on Cuban doctors practising where they are needed throughout the world. I've never heard a complaint of any practising here although I spoke to the wife of a Cuban doctor at the liquor store last week who expressed an opinion of Canada as different as yours and mine of our Cuban experiences.
When I asked how she and family were getting along, she made a little grimace, shrugged her shoulders, and said they were going back to Cuba. Why? "No one wants to work here; there's work but they don't want to do it." She may have been too polite to say we're lazy from entitlements but she appeared to prefer her native paradise to ours. (And she may have been right.)