I totally understand your feelings towards your mother. Mine chose a lifestyle that didn't include us kids. I never felt compelled to honor her on Mother's day, tho I did love her. (She passed a few years ago.) She never seemed to expect anything either, so...

If you are an adult and on your own, it's your choice whether to do the traditions or not. If you are still with her, then you might have to do as expected until you can decide for yourself.