8-2 in placements and placed Iron 1

Was unranked in flex and played a game and got placed in Iron 4. I assumed it was a bug and would be resolved in completing placements but I got placed in Iron 1 to my delight. While I'm not a great player I'm still ranked Platinum in Solo/duo so surely some mmr would have carried over. It's a little bit unfair when i'm matched with bronze/silver/low gold players so surely this isn't intentional.
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