My point is that some of the accounts do report trees. While the stories of deforestation are true it’s a far cry from the island being baron and inhabitants turning into savage cannibals. That’s the subjective part.
Yet we do know with certainty that hundreds, if not thousands, of inhabitants were taken as slaves and the remaining suffered from rampant diseases that were introduced to that island.
So what killed them might not have been lack of resources but rather the same old story of more powerful nations exploiting them.