@apjj I want to know how it works too. Not so much to get around it, but just to get a better grasp on the metrics of my teammates and my skill and the lobbies I'm in.
Are you sure you're not just having a bad night? I have periods in which I do really well and end up in top tier lobbies. I have periods in which I do horribly. It's not always SBMM that is the issue, sometimes it's just the way I'm playing and bad luck in game.
I do understand the frustration when you get melted by a team/player who is just on another level. But don't you have moments in which you're on a level and you melt entire squads?! I think we all do, I just had one tonight I took down 5 squads in Frag by myself. I only took maybe 150-200 damage throughout the entire fight. Everything was just clicking for me, my movement, my aim, my guns, legend ability use.. We all have dominate rounds like that.