Placements are bad since ppl are treated unevenly by them. Everyone will be pulled towards the 1200 mark. And due to the very broad matchmaking, everyone will be playing with everyone. Depending on your class and if you duo or not this will lead to uncarryable games. Since the first few matches you play are key to your placement; getting "unlucky" during those games means you will sink hard. The only way to maneuver around it is to play duo where both players are playing high dmg/burst roamers (holo, thief, zerker rev). Where you and your duo just run around and burst ppl down. Since half of the teams will be filled with 1000-1400 ppl who will just flop playign a duo like this will lead to snowballing of most matches you're in. If you like to play support, sidenoder, teamfight brawler you're out of luck. This isn't as effective for placements. If you cant roam across the entire map and kill literally everyone you can still lose. This is a screen of my results during a lost match. I held and killed 2-3 ppl at far solo pretty much the entire game. https://imgur.com/DjmWSLm