What is wrong with Matchmaking in normal games

This is my team composition in the previous game : Silver 1, Gold 4, Gold 3, Gold 1, Bronze 1 And this is the enemy's : Diamond 3, Gold 1, Platinum 4, Diamond 3, Gold 4 In what universe is this ok in matchmaking, and its not just this game, i have noticed this pattern of super weak, bronze and silver teams playing vs diamond, plat on multiple occasions, also is level not taking into consideration, literraly in every game im teamed up with people who are levels 30-60, and we play vs people who are levels 200-300. what the f is happening?!?
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