One thing that really messed with me last season was playing around with different champs in ranked. What I'd do it play some non-ranked matches. Pick about 2 champions per role you want to work on. Practice those champs for a few games each and any role you're not great in, practice that even more. The more games you get in with stuff you're currently uncomfortable with, the better you'll be able to assist other players in solo Q. Solo Q isn't always about hard carrying yourself. Sometimes, it's about good decision making and inherently carrying yourself so you can make your teammates better. Making your team better is probably one of the most difficult things to do, but after you develop the ability to adapt to different roles, you allow the randomness of solo Q and other's abilities to shine a bit better. That's why decent players like Destiny who are moving from SC2 to League are struggling to jump up to pro ranks. Every once in a while, you'll come across players who won't listen, period, but you can't expect to win every game. You just gotta put away the frustrations, do your role the best, lead when you need to lead, and follow when you need to follow. Most games in mid-elo are won or lost by dysfunction or coordination. If you can run every role to a decent level, it'll make things a lot easier. I like to jungle, but I've put in a lot of hours in other roles, and now, with the new season, I actually rocked out Support, probably my worst role, but put in some time with support Fiddle, and it's working out well.