Been to Cuba 3 times now, and have happily had zero issues with the food. It's bland 100%, but now I figured out that I can bring my own spices and sauces in order to make it better.
Same experience. Traveled all over Cuba for almost a month and never had any GI issues, which is surprising for a Latin American country.
Their medical system is unsurpassed though - they churn out a record number of doctors out of their education program, so perhaps this knowledge of hygiene influences their sanitation system.