Autofill was designed to make searching for games, however autofill also forces players into a role they don't know how to play or rarely play,  for example, i never jungle, i find jungling too much of a hassle for me, so when i do badly people tend to flame me if i don't gank by level 2 when the enemy jungler has, i don't know how to farm correctly or in order in it, and so forth, it literally throws every game i go into.