Autofill ruins games

I played 7 games in a row support by my choice by I only get autofill protection for 1-2 games? Then when I decide to play something else I get autofilled jungle and lose cause I have no idea how to jungle and the enemy counter jungles me.

Thanks for ruining my 12 win streak for nothing. Also my team has always less mmr than the enemies. I guess that happens when you win a lot and the game wants you to lose.