My daughter calls me crazy, and I'm not sure how to handle that

I am divorced and happily remarried. Our blended family of children are in their 20s. My youngest, age 20, continues to call me crazy and favors her dad. He was abusive to me, and I left with injuries. He never wanted kids, and I did. He paid child support only through forced wage earners. Now my daughters favor him after all the sacrifices I made for them the past 15 years as a single mom. I don't deny them a relationship with their dad, but to be called crazy and then watch them hang out with him hurts me to the very core. I'm not sure how to handle this.