Just reached possibly high elo

And, what i see in this games, it's unreal..the game is being played with only 20 champs:|.Let's take ADC for example- there are only 4 champs that i see in everygame Lucian, Cait, Ez, Jhin..That's it:|..Jungle is the same, Nidalee, Gragas, Graves,Lee Sin:|. Can we have some diversity in this games?