What eSport are you watching where it is NOT "us VS them"? Starcraft is a 1v1 game. LoL is a 5v5 game. Not sure what other eSports there are, but the major ones are always pitting humans against eachother...
us. them. plural words. the viewer and player being part of the same group.
You're badly misinterpreting that line. It's about the fans, not whether the players compete (obviously the players compete). "us vs them" is when you hear a fan say a phrase like "we won".
It's certainly possible to get wrapped up in a fandom in eSports, but from my limited perspective it's much less common.
