Just stick to top/mid/jungle if you actually want to climb. trying to win a lane and stop your support being stupid is tough, but if the unlikely chance that your support has a brain, don't expect the rest of your team to.
trying to carry with such a squishy character relying on autoattacks, isn't good enough, too many things kill you in too short of a timeframe
Just pick a bruiser and hope you can carry.
that's my advice