Waiting forever for a match

Why are we waiting for so long to find a match? i know there are plenty of people that play league. I understand some of it depends on what roll you want-levels-ect, but im a support main and can usually find a match instantly. But here as of late, I cant find a match without waiting 10+ minutes. No i dont have any type of penalty either. Im currently in a que of 11 minutes. Its almost not worth the wait.