The option to avoid being matched up with a particular player has been removed from Overwatch, Blizzard said today.
If you’ve ever used the “Avoid this Player” feature in Overwatch to keep from seeing someone in-game, you might run into them again soon. Blizzard said today that it has removed that option from the game. The UI option still appears, but it no longer functions. It will be removed in a future patch.
In a post on the right here.