What's a good way to address a dysfunctional relationship with my mother?

Psychotherapy: The most helpful approach would likely be individual psychotherapy for you -- since you're the one suffering enough to mention it. You could share your concerns with a professional who can help you explore what's happening. In the supportive space with the therapist, you can devise ways of dealing with your feelings and your mother. Your mother may not like it, but at least you will grow!