Swedes can be douchebags, but most of the ones ive met in games have been quite funny, and can take a joke. Russians are easy to hate simply because there are so fcking many of them, but ive met a chunk of friendly minded ones aswell. Ive gotta say, i think germans are the ones with the most scummy types, some are just completely unable to see a joke and instantly takes offense, others are pure tryhard who flames but sucks themselves etc. Dota doesnt have many of them but holy shit there are a lot of germans in rocket league.