Sbmm is broken

During last nights gaming session, I played about 8 ranked games and maybe 12 casual with the same premade squad and the difference between ranked and casual was night and day. Literally EVERY ranked game, we got insta-wiped by a full Predator squad, when we all are in Diamond 4. Im not saying our full lobby was predators; but literally every squad that we eventually died to in each game were predators. Anyways, the ranked sbmm was quite "broad" since they put the top 150 predator in the same room as Diamond 4s =)

But then we started to play casual and it was so easy. I think we won 5 or 6/12 games, usually all of us with 2k dmg and .6-10ish kills. You could clearly "feel" during fights that most players were skilled below average. So I wonder if Respawn secretly revered the casual matchmaking to random again? Another theory is that your ranked games affecting your SBMM in casual, i.e. if you get your butt whopped in ranked, you get "consoled" by easy casual games? After those 8 ranked game, I guess I had a K/D of like 0.2 or something. Maybe the SBMM put me in the 0.2 k/D matches for my upcoming causal games?