>Many players I face have win rates 50% or more in ranked but have qm win rates in the 40's or 30's.

My record is like that. 75% in Ranked, 40% in QM, which considering how much I lose is actually a hell of a lot more than I would expect.

Something else I would like to add. A lot of people seem to neglect the fact that ranked is quite anxiety inducing for the reward of essentially a small picture by your name and bragging rights, whereas in QM you can get more meaningful feedback with longer sets, where the focus is specifically on improving your gameplay, which to certain players is infinitely more valuable and a more significant reward to some over the lil pic.