Riot please improve your stupid ranking system.

Riot please improve your stupid ranking system. I am just a noob in LOL. I am silver and I believe I can never get out of silver. However, partially the reason is your stupid ranking system. I tried so hard to get 100 points and enter series. And then what happened in my first game of series? One player locked yasuo and indicated he will play mid. But he kept staying in base for the whole game. Our adc is a new player, so what do you want from me in series ? It was indeed 3v5 game. If you want us noob players in silver to prove us in such an insane way like 3v5, I would like to say : fuck you, fuck your ranking system. and I will delete LOL from my pc.