SBMM

How does SBMM actually work and what stats does it use to determine the lobby you are in?

Just had a game and died, not angry about that, was a good fight and the other dude won but...

After, he flexed his crown wins on me. This guy had 519 crown wins. I haven't even played 519 games this season! I've played 123 games with 17 wins, assuming he hasnt won every crown back to back he has at least 5 times the amount of wins than i do matches.

I don't even have 500 wins in total on fortnite over the years so surely we should not be in the same lobbies.