None of that would be acceptable with my kids. We simply don't allow that kind of disrespect or rudeness. This is a child who has been given no boundaries, and this is the result. And yes, it stems probably from poor parenting practices -- usually a lack of consistency. What may need to happen is that you and your ex need to get on the same page with your parenting practices; your daughter is not respecting either of you because it sounds like either or both of you little consistency about what you expect from her and you aren't backing each other up.