I really liked the concept of DQ.
It was just mishandled so horribly early on, and gave players such a sour taste in their mouth anytime Riot tried to talk about it.
It had some great concepts, and good intention. It tried to make the game better for people who wanted more ways to play with friends.
It elevated some of the playerbase, but at the expense of others.
If they only added the option for Trios to queue up, it likely wouldn't have been a problem this season.
At the beginning, there would have been some commotion, but it would have likely died down after a short time as people accepted it. There would not have been the "5 man group vs 5 solos" or "1 solo with a 4-man gets ignored, fuck rito" qq threads and all that negativity bias towards the system.