Balanced matchmaking

https://preview.redd.it/bb7gpkanidb61.png?width=341&format=png&auto=webp&s=24fb9f660948f6b1653d21e7e6153c6b7978834e

For context, our Ahri was level 48, their Sett 286. Level difference was 876 between both teams with ours at 563 and enemy 1439.
I'm used to being placed in Gold/Platinum elo but now I get basically low silver/bronze on my team while enemy consisted of 4 Platinum/Diamond players and 1 silver. How this even happened during matchmaking is beyond me.