I don’t think mature subject such as divorce are meant to be taught to children who come from normal family backgrounds.
Normalizing breakup that too for kids of an impressionable age is not normal according to me.Also the film is openly promoting same sex living together (that shown as the oracles of sun and moon)
Just by making it into an animation it doesn’t mean that the film is fit for children. If you are teaching your kids the fundamental values of staying together then this movie is a definite no-no.