Everybody has different skill levels, and some I believe just have the gift of an artists eye, not everyone is born with that, but we are all creative. I'm sure you have improved and you are just being too hard on yourself. you don't become a Rembrandt overnight. It takes years of practice. Maybe you need to try new techniques maybe you'd be better at applique than traditional or paper piecing, maybe you haven't found you niche in quilting yet. Don't give up you'll get there