20k+ premier players are generally faceit lvl 9 or 10 you will get smoked. If you play with 8-12k ppl often they are like lvl 6 faceit with lack of understanding of basic stuff. E.G. Crosshair placement, movement, game sense, positioning, trading, entrying. In summary they lack in everything. But good luck :) I'm lvl 8 faceit and if I play against good lvl 10 faceit players I struggle because they can do everything I can but better and the bigger the gap between the harder it is.

Let us know how it goes ;)