I respect your courage and insight so much, so please take this as constructive. You may be more like your mom than you thought-- if only because the things that drive us batty in others are often the things we don't like about ourselves.
I am, sadly, way more like my mom than I should be. I battle against that daily, and see it much more clearly now, especially now that I have a kid.
But the amazing, powerful and hopeful thing we have going for us, which our moms don't seem to have, is that we are self-reflective and willing and able to change.
(I wonder-- is it an age thing? Was my mom more self-reflective when she was younger??)