Welcome DadHurtsPostDvrc,
Sorry for the circumstances that brought you here, but so glad you found us. I think you will discover that you are not alone in what you have been through and what you are dealing with now. You can fnd a lot of answers in the lessons and articles here on the links to the right of this page. We can help you work on making things better.
Sounds like you are having an especially tough time with your ex and the custody agreement. If you could tell us a little more about the parenting plan and how she has violated the agreement then we will know more how we can support you.
Coparenting with a manipulative person is surely hurtful for you and the kids. I am attaching a link below to some lessons on dealing with "Parental Alienation"
https://bpdfamily.com/message_board/index.php?topic=182254.msg1331467#msg1331467After you get a chance to read the article, you may have additional questions and i am sure that other members will join in and share common experiences.
Again, welcome to the BPD family.
Peace and blessings,
Mustbeabetterway