You thought autofill would result in faster queue times...
But you didn't account for the sheer number of players that dodge because they're not going to be held hostage in a game playing a role they're not good at. I cannot tell you how many times I have been in a pregame lobbies back to back that involved multiple players dodging.
I que'd Mid/Jungle earlier, got mid 5 times in a row (someone dodged all 5) and on the 6th match, I autofilled to support (of course no one dodged that time right?) Why is this allowed to happen?