ranked roles

this probably has been said numerous times but this feels really frustrating. I played my first game some time in beta, and i played actively next few years. i dont remeber exact years but i think i stopped playing like 1-2 years ago, and now i decided to try the game again. I have played like a week now and lots of things have changed but im learning them as i play. i mostly played mid back before i decided to take a break from the game and now the reason why im typing this. ranked matchmaking requires to pick 2 lanes. Have mostly played mid and my games are more better if i get the lane, but i have to choose 2 lanes and still i might get autofilled to role i cant play, in this case its the 4 other lanes. i dont care how long que times i have if i get my lane. I have tryed to play other roles but i simply suck at them and i dont have intrest to even learn them. cant we just pick 1 option for the lane? Second lane choice should be optional. im just tired of getting flamed

its not long text but TLDR; coming back to the game. I can only play 1 lane for now. Playing badly and getting flamed when playing something else, let me choose only 1 lane in ranked matchmaking