Servers out of North America

Matchmaking insists on putting me on North American servers, even if I’m in Brazil. I know there are players here, because through advanced routing I was able to find nearby matches. After an update, the game no longer allows me to use this feature, constantly putting me on servers where my ping is at 150 ms. This is frustrating, we from other parts of the world are serving as bots for North American players. Is there some way to choose which server we want to limit searches by matches?