You could try improving your lane techniques and team decision making , if you look back in your games you will notice that even when you win a lane vs a hyper carry like jinx, trist or cait , they will still do almost as much damage as you or even more, this game is all about winning your lane hard, I mean getting your self ahead means your team has one advantage over the enemy but if you can get the enemy laner behind by denying him cs through lane freezing/zoning and teleport/jungler assisted tower diving, you get another advantage and if you can do that in duo lane well, that quadruples your advantage .
Punishing your lane opponent that hard isn't always the best way to go, sometimes its just better to abuse your power advantage to siege objectives with your team something that will extend you lead, its up to you to decide what's better, keep in mind that the biggest thing that separates gold silver and bronze from higher tiers is individual and team overall decision making, I mean having a high level of game mechanics is still important but knowing some auto cancelations, dodging a few more skills shots and landing yours a bit more consistently doesn't win you games.