My placements were as miserable as yours @Jetsetlemming, two quitters, few ppl that just spewed hate and wouldn't switch. Got my rank at ~2730 which was last season 2960.
Felt like a shitty situation but for some odd reason I managed to climb back to diamond in one evening. Something's changed in the SR reward system, felt like I was awarded twice as more from wins than from losses.
Even yesterday I climbed 30 SR from 3 wins and 3 losses. Last season the difference would have been less than 10 SR from 50% win ratio.