Why am I cannon fodder?!

I finished at Plat 3 last season. My very first game today I got demolished and placed 2nd against a squad that was all predators from last season. Clearly using mouse and keyboard on PS4 just by the way they were moving. So my first match of this new season, makes me never want to play the game again. Whatever matchmaking they have going, simply is not working at all. 

Same with ranked. It put me down to silver 2 to start, get rocked by a guy that's plat 3 this season. I just don't get it, and respawn refuses to talk about it other than their excerpt at the end of the reddit patch notes saying "SBMM has been there since launch" I do not believe that, at all.