A way to improve match making

I think the current match making sistem has a lot of flaws, autofilled players make it an almost guaranteed loss, and they dont say they got autofilled. I suggest that players have to unlock a role and a champion to play in that role by having an overall good score with the champion on that role as well as how many wins in a row that player has in normals , the player will unlock said champion and role to play in rank, he cant play a role he doesnt know, or a champion he doesnt know. After unlocking the role and champion, he can select said role, and only lock in the champions he unlocked the role with. It will increase the time to find a match, but waiting 5 minutes and getting a win is way better than waiting 5 seconds only to lose. And while the dodging sistem helps, you can only dodge once a day, but what do you do after you dodge, now you have no way to get out of game with no penalty. This will make undesired roles such as suport or top a lot more demanding, because the number of players is low, and people who dont like waiting to find a mach can unlock a role like support to get in game faster. ( please post your ideeas that can help the match making sistem)