Keep playing
The League of Legends ranked system is a well-aged equation that relies on a simple statistical pillar. Though the outcome of a match will be dependent on some factors you cannot control, like your teammates or the opposing team, you will end up in your true skill rank eventually.
It works like this: If you play consistently well, then your team has one guaranteed player of skill who will make good decisions and play at their maximum skill level. The enemy team has 5 players slots up to chance, which can be filled with players above or below your skill level. Your team, provided you are playing at your peak ability, has 4 player slots left up to chance, and one guaranteed player of appropriate skill (you). The rules of random assortment mean that even though you may get lower-skill teammates that ruin your climbing, the enemy has more of a chance to get them.
Your team has a higher probability of winning against the enemy if you are playing at a higher skill level than your rank, aka trying to climb. You should then be able to climb as well as you play given a large enough grouping of games. Theoretically.
This statistical placement doesn’t always feel right when you’re in the midst of a LoL losing streak or a couple of heart-wrenching defeats. But, if you keep playing at your best, you ought to see just opportunity to advance. Climbing ranks is only a generous sample size away.
And generally, this principle is good to keep in mind so that you can….