The main problem with match-making
I understand your irony.
For me the biggest problem are blow-out matches. Losing 499-500 is bad luck. Losing 0-500 is not at all enjoyable. Then MM has failed.
This game needs a proper tutorial. While u could argue that there was an MMR hell in season 2. Something the developers looked at themselves to adress. In season 3 from what has been shown through screenshots in all those threads. Most matches weren’t really that much of a different. U see wins of between 350-500 difference. I wouldn’t call that a stomp. And some matches had less then a 100 point difference at that point it becomes a game of who makes the most mistakes when it comes to rotating. Als it seemed they have reduced the mmr difference between teams developers claim.