Joy don't be so hard on yourself. You are such a caregiver with all you do. I have always been taught to do the best you can and if it's not perfect so what it's the time and love you put into doing things. Some of the quilts on here are just gorgeous. We all have our things we are best at but to be so down on yourself for a 1/4 seam don't do it. I'm sure all my seams are not perfect. You sound like a good person and caretaker and just Smile, Smile. It's hard when your taking care of people sometimes it gets you down.
God bless you my dear lady. Sue