Some people spend thousands of plat and they pvp, that doesn't mean they are good. I know some friends of mine that spent 1k+$ and pvp and they don't even have a positive KDR, Some people who have ordinary gear with average jewels play pvp and rekt them. It's not about the more plat you spend the better you'll be at pvp. Yeah ofc better gear will give you an upperhand over your opponent, but it's skill not gear.