mafia_is_mafiaOverwatch has the opposite problem.
Everyone complains that it sucks to solo queue because anytime you get queued up with a 6 man stack its very hard to win. TF2 took the other path, ensure solo queues play mostly solo queues but that screws up people who play in parties.
for the record blizzard attempted to do the same thing with overwatch but sucked at it. it's supposed to match identical size parties - so, for instance, a party of 2, 3, and 1 will go up against another party of 2, 3, and 1. it doesn't work in practice though because blizzard set wait times where the matchmaker would just pair you up with odd teams if you waited too long. valve doesn't have such a timer... hence the even longer wait times for larger groups, on top of the already absurdly long wait times that Jill called a bug.