I will admit that the game is slightly balanced toward range characters, specifically ADCs and supports. But if you play a champ long enough, these things do not matter. The best case scenario is a game recent that I won against a top udyr. His team was feeding horribly but he managed to get super fed. I literally said "udyr cannot win 1v5." 5 minutes later, he gets a pentakill through luck, patience, and skill. Again, he did not win, but he came scarily close to winning a 1v5 game.
Also, you can just quit league. Hundreds of games, books, comics, manga, anime, tv shows, and other stuff come out every year. You can easily find entertainment elsewhere.