I've been playing QM for a while now and i noticed when i click on Quickmatch (the page where the big green play now button is), it says there "You've won 111 QM games (rank 18)"

Can someone explain to me where I am rank 18? On which leaderboard? This is not true.
I was going to attach a picture but that is not poss.

I think rank 18 is how many templates you've unlocked. Definitely isn't do to with your rank on the leaderboards.

where is the qm leaderboards?

@THE TungstenTrex
Multiplayer->Quickmatch->Leaderboards or https://www.warzone.com/MultiPlayer?Quickmatch=1 and click Leaderboards.

Can confirm QM ranking has nothing to do with skill

I'm rank 35 after a month of QM fighting, and still make common noob moves

if you check on voting you can see what the ranking has to mean, it is for the templates that are available for you as a player. The first 7 templates (ranks) are fixed but after those the ones with the most votes are ranked the highest.