The problem is deeper than what most people understand. Valorant is a truly global game which touched countries which have never before been in PC esports. Riot artificially tried to create 2 Tiers in a game where there's absolutely no scope for it unlike traditional sports. Traditional sports are far-reaching with most teams representing local cities where everybody has a special connect to their own city nd turn up to stadiums to watch their locals play while also having an absolute favorite like Barca nd Madrid in football.
Meanwhile in Valorant teams generally represent whole country and when your country has a team playing in VCT they take up the role of both local and international fav suffocating other teams. Any Tier 2 team having a fanbase is either due to a player/coach/creator who is well known or due to the fact that they represent a country not represented in VCT like Vietnam nd Mongolia.
TLDR there's no way to build any fanbase in Tier 2 valorant which I will touch upon in one more way .