Loss prevented

It was my first placement game, we had a retard at top who gave first blood at 2:50, blamed laggs, was 0-4 at 9:30 and went afk from level 4 for the rest of the game. We obviously lost despite all other lanes winning and it said it was Loss Prevented, although near my placements it shows 0W 1L, so does it count as a defeat towards my placements or not?
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