no reason you should be a bad mum just because your mum was.
Just the opposite - one of life's little pleasures is figuring out how your parents went wrong and refusing to follow their example. (My parents smacked, I never did.)
Of course it's possible you may come up with a few mistakes of your own, as I did. That'll be your kids' problem! But the main thing is that bad parenting isn't inherited - it's learned, and you can unlearn it, once you've analysed it, which you are doing.
Sounds like you already have a list of things not to do. Great. Stick with it.