We need to look at each quilt we make as part of the process of becoming a quilter. I learn something new with each quilt...a better method, quick trick, or perfecting a skill. I don't stress over a quilt as this is my hobby and should be fun. When it becomes no longer fun I will sell off my stash. :)
As for good enough....look at the Quilts of Gee's Bend...no matched points, not square would probably do lousy at a judged show, but they are beautiful because of the quilters. Let's not be so hard on ourselves and just enjoy the process.