The SR system is fair

MHz’s theories are even worse than Cuthbert’s. At least Cuthbert took a Blizzard statement, but twisted the hell out of it to fit his narrative. MHz just completely made BS up and claimed he “tested” them.

Everything I know about Overwatch’s matchmaker in particular comes from Kaawumba’s topics, and he’s compiled every single Blizzard statement on matchmaking into his references section:

I decided to use the line that “MMR basically translates to your SR” because of these two Jeff Kaplan posts

In particular, Jeff states that unless your SR decayed due to inactivity (above diamond), your MMR and SR are “closely linked”.

Also stated is that MMR works similarly to SR, and that it going up or down is contingent on winning and losing: