70% win rate only silver

well if positive stats and winning doesn’t = ranking up, what am i supposed to be doing then? I understand my winning percentage will gradually drop as I play more and more, and that is fine, but I’m saying that currently I’m performing well and winning often and I’m not seeing as much progress as some others with poorer stats and less wins. It is demotivating seeing my friends gaining gold and plat with half the wins i have.