Matchmaking is so unbalanced because
Half of the games there is either an AFK or you can't even play the game because of a gamebreaking bug.
I see people who are way above my skill level and way below.
Last game I had another afk that lost us the game. Guess what I lost LP. A game I had 0 control of lost me lp.
Let's say I get 10 afk's in a row (wich is likely) then I lose about a tier or 2. So I will be bullying my lane all the time until I climb back up, and get more afk's.
Also alot of the games are remakes where the person having a bug loses lp.