Need help with ranked Advice/GoodDuo?

I've been trying for the past week straight non-stop playing league. Only playing soraka support and carrying games so hard, but I keep losing due to feeders and afk's. Seriously, look at my profile and match history please, and can someone please give me pointers on what I can do improve? I can play any lane but I was able to get to bronze 4 from 5 playing just soraka, hence so many soraka games with her recently. There is somewhere where I legit go on a 8game win streak and I'm still bronze4??? Can someone please tell me what I'm doing wrong? Or why I deserve this at least? I'm so close to losing my mind over this game and I'm trying my best to be mature about it in games and stuff but league is like, my one hobby you know?