Matchmaking is bogus, ranked play is unfair
My performance feels largely irrelevant, as wins and loses aren't dependent upon how well I play, but how poor my teammates are. Not that I’m great or anything, but I try. I listen, pay attention, try to improve my performance, etc.
I'm Bronze 1 being matched against Gold players(last match I was put against a Gold IV Aatrox)-- I still manage to play well, but it's immaterial because my success is in the hands of players that die 10+ times within 20 mins while flaming myself and the rest of their team. These players are ranked higher than me, mind you...
It's not only extremely frustrating, but discourages one from even wanting to play ranked. I can study the strength and weaknesses of my champs, teach myself how to cs and manage waves, learn & stress the importance of warding and macro play, etc-- and it doesn't matter, because I can't control the other four players I'm matched with.