I'm gonna be blunt: you have a 37% win rate over ~300 games in B5 this season. You have a sub-50% winrate on every champion you have played in Ranked except for Ashe, and that's a small sample size on her.
I'm pretty confident in saying that the problem is not your teammates.
I looked at the detailed stats of some of your recent games. I'm not seeing these intentionally feeding teammates. There have certainly been some matches where your toplaner has struggled, but being 0/4/2 at 20m is not "feeding", that's just regular old losing lane.
If you think the problem is that the toplaners at your MMR are bad, play it yourself.