Omg.... that phase will pass.. you just gotta soldier on through it! I can't tell you how many(BAZILLIONS) of poor pieces of paper I've crumpled and thrown away. Unfortunately mistakes are a vital part of learning.... I almost quit drawing many times out of frustration, but I didn't and look where I am now. xD Try tracing or copying from a few of your favorite drawings, sometimes it's just what you need for something to click. :)