It sounds like you had a great day with your daughter! It might help you to build strong mothers day traditions with her, so that you always have that positivity to focus on.
Unfortunately, your fiance is right about your dad. He has committed to a long term relationship with your mom and he probably will just bury his head further into the sand. My mom complained constantly about my dad to me before I went no contact, but now she is dead silent because I have taken the leap and removed myself from the situation.
Thank you starting over. I do have a relationship with my dad and I intend to keep it that way.