Overwatch (1 and 2) had/have an avoid system, but it only avoids as teammate. Overwatch 1 use to at the very beginning have a system to avoid a player as a whole and they wouldn't be matched in your game at all, but that was remove really early on, as it is easily abusable against good player (I don't want them on the enemy team, they are too good so just get rid of them entirely) and there was a report system anyway for other kinda bad stuff.

Then there is just the endorsement system, which is just a level from 1-5 and you can endorse people you liked playing with. It doesn't really do much in matchmaking but you can't do certain things if you are below a certain level (I forgot what all it was but you can't make (public?) custom games if you are too low and I think text and voice chat could also get disabled if you are too low).