Even in CS, there was a huge divide in regions. NA was mocked for years on CS. Br was mocked aswell. Esports has this weird desire for region vs region, as has been common in pretty much every esport scene. Siege had it, CS had it, Val has it, league, dota, etc. They all have it.
I'm not sure why it's a thing, considering other sports tend to go towards city/town based teams, in which they grew up around. HOwever that never stopped people being fans of other nations teams. Supporting ones nation in an event like a world cup, I understand. Having to feel like you have to blindly support a whole region, just to better than another, I dont fully understand. The memes and banter of region vs region can be hilarious at times. It's when some people base their whole personality around EU> this region, or NA > that region, etc.
CS it might not be as obvious as it's always been EU on top, besides the BR era of sk/lg. Even then, it was a single team that was insane at the time. Right now NA has one team in CS that is actually decent, and BR has one, potentially 2 if 00N can actually win a bo3 against an eu team.
That's why CS might appear to not have region vs region loyalty, but it does. It's just been around that inside those regions, you have rivalries.
Just look anywhere when it's an EU team vs NA/BR. EU fans flock to support the EU team playing, and NA support the NA team playing. Just not there's no real rivalries in NA, as it's a 1 team region.