Strange. A lot of times I see nothing but "noob only" games, and I have to make a game or wait a bit of time.
When I started this epoch, I was running around 18% win ratio. It wasn't because I sucked. In the previous epoch, when I wasn't the worst, I was running around 39% or so win ratio.
I was a legimate example of a bad luck run early in the current epoch. Because everyone had the 'same stats', I could not tell who was noob or not and I wasn't smart enough to use he website to look at historic games in the previous epoch.
That said, due to law of numbers, you will overcome your record if you keep playing if you are really good.
Just play a lot of noob games and you can easily overcome the "low win ratio". It balances itself out in the end.