OW competitive team balancing

Why is it that whenever I get my competitive placement games done, my team doesn’t know their lefts from right but the enemy team seems to be compiled of the most advanced players in the game? Like genuinely my mercy last match was healbotting our full health bastion and kept rezing me in the middle of mei ult and somehow I’m to blame? My predicted rank is now bronze 3 down from gold 2 because my placement teams are the worst players to grace this earth.