And IIRC kungdoo thing is from pre-match clips from Apex Season 1. Lots of korean translated stuff on r/Competitiveoverwatch/.
Reinforce says the only real competition they had was NiP(They usually only run triple tank) so there was a lack of dive teams to practice against. (I don't know why they didn't scrim against Eunited. Were they not good enough or not scriming due to recent organizational changes). Not many EU tournaments to really judge the scene there but it is probably not healthy :/
Eunited(previously Reunited) and Rogue were in Korea while Misfits were still in EU during APEX season 1 leaving NiP as the only other Tier 1 EU team for them to scrim which almost exclusively plays Triple tank. There's an interview from DH Winter where Zebbosai explained their situation at the time iirc(essentially that they'd roll any Tier 2 teams and they weren't getting a lot out of scrimming only against triple tank).