Not the absurdly mismatched teams.
But that the MM often creates the worst balance outcome possible from the 10 heroes available when it could of quite easily made more balanced teams.
Did your opponents get a solid tank, a solid healer, and 3 mixed dps?, that probably means you got Murky, Aba, Tassadar, Gazlowe and a C tier tank.
Did your opponents get two tanks, a bruiser, a healer and a high tier dps?.
You get a C tier bruiser and 2 CD based squishies and Murky that get rushed and crushed every time.
Doesn’t help that Murky and/or Aba are in 75% of QM games and are extremely comp/map dependent compared to the average hero.