I know most people say the only way to get better is simply to play the game, but I met someone who is radiant and he never played kovaaks/aimlab, he never played csgo, he literally went from LoL to Valorant and got immortal in act 2, barel...

I was watching VCT then came across this thought. So in VCT your team can ban at least 1 map. You also get to pick your own. I think the banning goes first so your pick might be not be your best map. Unless the opponent bans their worst map...