Yeah absolutely correct! Thanx for this forum XD..
Facing the same issue lately.. A 1600 joins my game even though i am like 400 points rated more..
I can't gain my rating anymore, its like +2 or +3 if I play these guys..
It's a request to add "Custom Game" option.. IT would be really helpful 
So, the paring system for the variants does not allow the player to know who he or she will play against, and it seems like rating is irrelevant as anyone can join any created match. What is happening is that A LOT of players simply refuse to play against me(probably because of the rating difference) and as they dont know that the match was created by me, they just enter the room and leave without playing, and when they create a match and I enter they room(without knowing, obviasly), they also leave without playing.
I already tryied banning those players, but it seems like it doesn't stop them from entering my games.
As I do believe the ban part is a bug, I will really appreciate if this issue receives some attention.