Why this random ass latam country has it so good? I don't fkng know, competition probably, as there are many companies fighting for costumers.

Its because of legacy technology debt, the US was "first" to deploy out consumer Internet infrastructure, but that also means before we could deploy each iteration something had/has to be done with the old and that's pricey

Now a developing country deploying internet infrastructure for the first time can deploy straight to fiber because the countries who were first did all the hard work developing the tech and they don't have to worry about ripping out any old infrastructure