Please do not let your Mother make you feel bad. There are no rules to quilting, except "enjoy the process"!
My Mother was just like your Mother. She constantly found fault with most everything I did. She wasn't happy until she was making me miserable. For my own piece of mind, and that of my husband and daughters, I had to limit my contact with her. You have to be your own person and be happy with yourself. If your mother can't be happy with you then she is missing out on a wonderful relationship. I know my mother did.