A thoughtful and well written living trust estate plan can do a lot of things:
But what it cannot do is fix a broken family.
An estate plan is not magic. It cannot heal bad relationships. Only you can do that.
Living trust estate planning and the resulting trust administration cab be smooth and easy with a family that gets along. But even a good estate plan cannot prevent a dysfunctional family from fighting.
Do your best to make peace and keep the peace with your family. That's your real legacy.