Blocking user

Hi everyone, don't know whether this is the right place to post this, but I had a question. A player in the variant lobby blocked me right after we played. What does it mean, and why is it the case ? Thanks in advance !

did you win the game

They basically don't want to get paired against you in games anymore.

I lost the game

Okay, thanks ! And by the way I lost it. (and unfortunately I guess we did all lose at this point here)