Brokeded MMR

I fail to understand how this account(in first ever placements) is deemed to have mid-high gold mmr after winning just 2 games, I am currently 3-0 in placements and the system determines that I am to be matched against a gold 4, gold 5 and gold 1(last season plat) y u do dis rito I just want to place gold and itll be hard if my mmr is gold after 2 matches
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