Is there any way to report/avoid players who intentionally throw?

[Claustrum]

I just got into CC and I've been having a pretty good time with it, but I just had my first match where a teammate sat down in the spawn area and did nothing for the match. Is there a way to make sure I'm never teamed up with this player again?

Edit: I did blacklist the player, but I'm not sure if that makes them unable to pvp with me.