normally i would be with you, in unranked game, where quitters are also a problem, it is way less a problem than in wildcards, even if it´s a fun casual mode.
Problem in Wildcard is that you need your teammates still alive to get back into the game, so if 1 of them leave you know by yourself that the chance to get into the late ring is nearly impossible and you can leave too, queue new, wait some time to rejoin and perhaps the same sh.. again xD.
Many ppl use wc only for getting badges and if they do bad at the beginning, they leave and rejoin and destroy the game for the 2 other teammates.