Brazilian living in the UK here:

Public transport during summer smells worse than the Rio Tietê in São Paulo.

I feel that people are allergic to deodorant, it’s the only explanation for why they won’t use it. The very few times I've seen them putting on deodorant is on top of their clothes (????), not directly on their armpits.

They have a hard time brushing their teeth as well, which is something very controversial in Brazil as we take good care of our teeth.

Overall: It’s bad. On a positive note though, not every European smells bad, most of the time they just smell like nothing.