Tip for climbing
Play a early game champion. If you are in lower ranks, and you play a late game champion like gangplank you are severely reducing your chances to win the game. You already know that if you lose lane to someone, they will snowball throughout the game and just win the game before you can reach the late game. Right now I believe games are getting shorter and shorter, so playing champions that are strong early is better. And if you really want to climb then abuse the shit out of the meta, they are the best for a reason.