ENTER YOUR QUILT! We are our own worst critics most of the time. What you think is not good, someone else will see as a work of art.
I, too, have difficulty accepting that the work(s) I have done are worthy of being taken seriously. I've never entered anything in a county fair or a quilt show, but I've heard people say that they are awesome, or wonderful, or perfect. I can't convince myself of that. My wife says that I should quit being so hard on myself. Maybe you should take her advice, too.