Balance Problems ≠ You Can't Climb
This game has its balance problems, but at its core it's still the same as always:
5 unknowns on the enemy team, 4 unknowns and _you _ on your team.
You continue to improve yourself, and you will climb over time. You accept that you won't win every game. If more people focused on the long-term and being the best players they could be, this community would be much nicer.
But instead, everyone chooses to watch trashy content. Hashinshin is just whiny in general and has his own gameplay he needs to work on. The majority of players aren't even near his level of play, yet they take every word he says as gospel.
Also, most of the balance problems in this game affect very high elo. A low elo player should not adopt the problems of a high elo player. The low elo player will have fundamental flaws in their gameplay (lack of lane control, objective control, rotations, etc.) that affect their ranking far more than the state of the game. Most of the things low elo players whine about have already been solved by high elo players, that's why they're in high elo. Many things that are "OP" in low elo aren't even viable in high elo.
Riot needs to stop catering to low elo players and take some initiative in helping them understand that if they want to climb, they need to improve themselves and make use of existing items and strategies to solve whatever they happen to think is "OP" at the time.
Tl;dr There's too much ignorance going around right now and it's not good for the game.