I am not high elo so yes I am a low elo scrub. However, I still do not understand why when I get a good KDA , win lane , and help other lanes I lose. Whenever I feed my ass off I win. I have been looking across my match history when i do bad like REALLY bad i always win those games anyone have any theories ?
It's called "feed to win" 
Team balance and your own personal strengths? I'm better at team fighting than laning. If I win lane early, often that means I'm on the higher end of the MMR spectrum for our game. That means I get a lead that isn't particularly useful (since I don't carry well), and my teammates are more likely to have a hard time in lane (and they might be used to winning lane).
Alternatively, it could just be luck :) I tried to play Galio back in s4 (or soon after Team Builder came out, whenever that was). I did really terribly with him, but my team won. And that kept happening. I wasn't helping out in team fights, and I fed my lane opponent like crazy. Galio was just cursed for me, so I never touched him again, lol.
