Autofilling ruins MMR which ruins matchmaking. Irony huh?
You get autofilled jungle. Not even support. But jungle.
You get Vs a Jungle main.
OFC you're gonna lose.
Then your MMR suffers.
So you drop.
But you're actually better than your MMR rating, so you stomp your enemy laner next game after you get your role
Then you get autofilled again maybe next 2nd 3rd game.
You know what comes next.
The cycle of life continues....you will not feed..they will die.