Dynamic queue is very toxic for this game
Why do I say this? Chances are that if the solo queuer is tilted, he might tilt one person in the 4 man premade and they might all go against him. Let's say someone in the 4 man does a mistake. The solo queuer lost about 5 games in a row and he rages at him, chances are all 4 of them MIGHT troll or afk on him AT the end.
4 mans are the worst since they all can surrender even though you guys clearly won the game.
Last night is a good example. I was about 3-1 with WW. What happens? The trio queue just AFKS out of nowhere on purpose. Me and the support were not toxic at all to anyone because we were owning.
I would rather deal with 1 afker rather than deal with 2 3 or 4.