If you quilt, you're a quilter! If the results were all that mattered we'd all just buy blankets and be done. But it's the PROCESS of creating a quilt that's important, and that process will involve a lifetime of learning. There will always be something you don't know, which is awesome because that's how we grow!
As others have said, make friends with your seam ripper(s) and just realize it's all part of the process. I'm working on some very small, simple projects right now to get myself moving again; nobody knows about them, they're just for me, and there's no pressure at all. Maybe that's a good next step for you to take, too?
If nothing else you can give your quilts to a dog. A young dog will eat it and an old dog will lie on it, and they'll both be happy whether your seams are straight or not. Ask me how I know. :)