You can't, because it's all an illusion. Riot rigs the elo system to profit off your addiction through a forced 50% winrate, or rather a set of wins and losses that keep you just pissed off enough to rage and maybe be banned so they can profit off you rebuying your account, or let you win and hit your dopamine receptors with the flashy lights, all while keeping maximum exposure to their online store.
So called "Pros" and "Streamers"? Bought and paid for to give you hope. You think Riot doesn't see a cut of those profits from ProGuides and other sites?
Elo boosters? If Riot were at all concerned with those sites they would have their legal team all over them like Blizzard does with private servers of their games. Riot profits off your misery.
The house always wins.
Most people don't see it, but their brain does.
Any rage or denial you see at this fact is simply the addiction talking. "Just keep playing, you'll win eventually!" says the gambler, while the casino counts his money with a chuckle.
"Your mechanics just need work! Keep practicing!" says the zealot of Pro Guides etc while he himself remains hard stuck despite taking the Iron to Plat course 5 times.