its a meme that bad players use. my wr at 150 (plat promos) was roughly 60%
I then tanked my mmr by being tilted that plat players are still garbage, being garbage myself, and duoing with a guy that was hard stuck silver 4.
Im talking gold 2 50 lp with silver 3 mmr trashed, ive just now gotten it unfucked it was so bad.
most games can be won, forced 50%'ers are just easily tilted and lose the game because they won't just let their team be retarded while they carry, or they play champs its hard to/they dont know how to carry with