To why they don't really perform well in APAC Challengers here's why...
Before Valorant, I've tried jumping in the professional scene of Rainbow Six Siege here in Indonesia and with my experience, all I can say is players there are treating pro play like ranked, IGLs only giving strats to their teammates without them knowing the reasons behind it or why they play it a certain way. + and yes they heavily rely on individual plays and aim, very minimal game sense.