80% Winrate in B3

I just played a game today, 5/31. The game lasted 28:59. I played Brand 8/10/6. I lost to a Rammus 10/7/18. This Rammus had a 80% winrate in Bronze 3. How the fk is that possible? Why is Riot pairing me so poorly? I'm on a 6-game losing streak; being paired with kids that get 1 maybe 2 kills per game cross the gambit. You gotta be fg kidding me Riot. Look at my matchups, review my games, and explain to me why you're punishing me by pairing me with dog dinky doo doo.