Great advice to restart the queue. Something I've noticed (don't know if it's just me or not) is that on those occasions where I am selected as my primary role or secondary role and experience a dodge, 2, 3, or 4 times eventually being auto-filled as support; that's the time that nobody dodges. Is it seriously to that point? I've had this happen to me enough times to seriously question how good this auto-fill feature is.
I saw someone's argument that the old school players that used to have to call and fight for your role don't mind as you typically had to be prepared to play every role before you could ranked efficiently. I've been playing since that time and I still think that it's BS that the players who won't dodge often times are stuck doing the auto-fill role when they really did receive their selected roles 3-4 times before that.