I don't understand their scoring system. Why would you give equal weightage to confirmed cases/deaths and confirmed cases/deaths per million people? Conversely, why consider only tests/1000 people and not also total tests if you're looking at cumulative numbers for the other metrics?
This is just so ignorant, of course a rich island nation will perform better than a poor country in South America.
Not only that one rich country, 96 other countries performed better than Brazil in the index. In top 10, there are Rwanda and Sri Lanka, neither of which can be labeled as rich countries. (Sri Lanka is an Island though).