I worked for SoundCloud for about a year, I can attest that SoundCloud was a huge mess, mostly because the two founders (both Swedish) had no clue how to manage the business.
I think every nationality represented in the company gave a good contribution to make the place both good and bad.
I can't say the Brazilians there were an issue, but I can see how some folks, especially in the infrastructure team, wouldn't like them.
I personally had a lot more issues with German people, both in the company and outside of it, to be honest.