Half of the mentioned regions have very less csgo pros. Most of the valo pros are just highly experienced csgo pros. When there are only handful of players, only the best combination dominates. Other teams who give tough competition do have few experienced csgo pros, but not a sudded players.
This dominance in minor region will only end if next generation of valorant pros(who didn't come from CS) which I assume will be in next 2-2.5 years. Thats when we will see real valorant skill.