We all do. As a matter of fact I just had that same conversation with my dad. He gave scrolling a shot and then he stopped in part because he was being so hard on himself. I found one of his peices and was actually impressed with it and told him as much. I told him I could also rip apart the peice because I knew what the original pattern looked like (I made it). Then I had to tell him that the people he gives or seels his work to wont know what "mistakes" or should I say creative ventures, he made. They will only see the beauty of the work. Something I need to remind myself of every now and again.