Question about weapon skin rewards

So we get weapon skins of the highest rank we achived? Well problem is a month or. 2 ago it was possible to rise to masters or d3 in a few matches because the rank system was broke even more…so is every crappy player gona have onyx and diamond skins from when the game was broke and they went from silver to diamond or masters in literally 3 or 4 games? I have a few friends who did this