You keep saying that Xion is mathematically wrong. Okay. Show your math.
Or you you can look at mine: https://www.reddit.com/r/OverwatchUniversity/comments/aatezy/why_match_quality_is_frequently_poor/, and see that resets take approximately 150 games per player to stabilize, and since many players don’t play that much, months of lower quality games is a reasonable expectation.
Or you can trust that Scott knows what he’s talking about (or hired people who know):