After one week of playing in ranked (I'm really a beginner), i would expect the matchmaking algorithm to have figured it out: I suck at this game!
So why haven't I been pushed down the ranks until I get to other players of similar low skill? I consistently lose 8/10 games. According to OP.GG, 3% of the player base are even worse than I am, so it should be easy enough to lower my rank until I find equally skilled players to match up with.
This is very frustrating, honestly.