The Bostoner Rebbetzin was talking to people who were considering divorce and encouraging them to get divorced. Her own parents were divorced so she knew that it can be better for people to get divorced and that it can be better for the kids.
It’s not anti-halachic at all. According to halacha, you can and should get divorced in certain cases. That is why the Rav of the Beis Din told you that you should get divorced.