I'm 100% certain now that the best way to carry in Solo Q is to main a bot lane role
You can go top and win lane and be as tanky as possible but as long as the adc has a bork/lw you're done for You can go mid and shit over your lane opponent but as long as they have a locket on their team or a smart support to peel you aint bursting shit You can go jungle and camp the shit out of everyone but as long as bot lane survives you won't matter
In my time in silver I've not cared for high elo because from my experience high elo people are douches, but i've played each role enough (or at least I think) in respective amounts of maining a champ in that role to figure out that bot lane is the lane that decides the game. The other lanes are merely walls that block bot lane.
Bot lane decides a game. Fact. Unless the enemy has a vayne then she wins the game