i just found out why my winrate has been hovering around 50% so much. It's because I've been playing with my friends who mostly have over 200 wins and one or two with wins in the 100s.
AND THAT'S THE WORST THING YOU CAN DO WITH 40 WINS xD
I was bored and wanted to try solo queuing again yesterday so I joined a game and picked Void and went bot with a Jakiro.
Well, I had to teach the Jakiro how to babysit but it wasn't horrible and I ended 16-3. Easy game, we absolutely raped the other team.
Next game, I pick AM and get the best pub babysitter I've ever played with who was playing SP. Annihilation, I ended 15-1-12 with 706 gpm in a 43 min game. (the one death was because the other supports on my team sucked cock and we had no wards so I ran into their entire team alone near rosh).
Moral of the story: If you want to win games and you still have a low amount of wins, just solo queue and take advantage of the fact that everyone else there is probably a LoL or HoN player.