MMR is so bs

Just played a casual game of ranked, i am currently gold 2 and have a normal gold mmr. In this game i had a Silver 3 and a bronze 1, while the enemy team only had one silver player rest was gold or low plat. WTF even is this mmr system that bronze player got destroyed by a plat fizz, and by that we just straight up lose. I hope this is some bug and will be fixed soon, because i just lost 20 lp to someone who was an entirety of 2 elo's below me. 2 elo's for crying out loud.
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