This is some kind of reverse "what did the Romans do for us" satire, right?
"But apart from killing 80% of the native population, who definitely weren't slaves because in return for their forced labour they were forcibly converted to Catholicism, what exactly did the Spanish do wrong?" The bills of rights were inspired by the extent of the conquistadors' brutality, were generally ignored and the New Laws lasted three whole years and one dead viceroy before the Spanish settlers forced the King to back down. I'm not sure missionaries teaching one nobleman Spanish so that he could write a petition to be ignored really offsets that.
"But apart from killing 80% of the native population, who definitely weren't slaves because in return for their forced labour they were forcibly converted to Catholicism, what exactly did the Spanish do wrong?" The bills of rights were inspired by the extent of the conquistadors' brutality, were generally ignored and the New Laws lasted three whole years and one dead viceroy before the Spanish settlers forced the King to back down. I'm not sure missionaries teaching one nobleman Spanish so that he could write a petition to be ignored really offsets that.