Why LOL is bad

I believe that ranked matching is a little bit broken and needs to be fixed. League of Legends is one of the most popular games and devs are doing their best to fix everything to make the game more enjoyable for everyone, but sometimes thats out of their hand. Most people rage in ranked games because they get trolls or bad players in their team. When I was Master, I used to get low Diamond players which would rage quit after they get killed at the start of the game