Bro you're literally Brazilian. I've heard from other vlr Brazilians about the streets in Brazil and it does not sound remotely comparable to Singaporean streets.
Come on. Everyone knows how much worse the Southern parts of Italy is in comparison to the North. I've been to the South probably two times in my entire life and I can say for a fact that some of the places down there are indeed quite nasty. But then again, every country has its good and bad bits, and I'm sure Brazil is the same.