Haven't played yesterday but maybe alliance premade wasn't there? Or they are afraid because of the other topic with screens? I mean It's been the whole Wsg weekend for me. Either I was in their premade vs 0 allies or alone in AB with ally premade already having 5 cap.
There are some premades that just play vs pugs and dodge vs other premades like you mention. This is basically OK - not very honorous but they may do it. The problem are things like I or OP experienced. There is no other way that on a WSG Weekend at EU primetime absolutely ZERO allies join for over 13 games in a row (I even posted that I won 13 WSG in a row at that day in the "QQ horde so bad" topic^^)
I mean I don't care much because I don't aim for any higher ranks but if somebody mentions the problem I will share my thoughts and experiences like here.
Greetings