I think there’s an element of talking past each other here - totally fair to say that we don’t know what happened so any judgment whose foundation is built on speculation is unfair. Also fair to say that postnatal hormones can send you loopy, that it must have been horrible for Anna to have been left with a newborn and a toddler, and that her ex may well have been justified in doing so nevertheless.
I will admit to finding the “if it was a man” thing not terribly useful - I know it’s not fashionable to emphasise this nowadays but whilst (obviously, I hope!) both sexes can be guilty of abuse both physical and psychological, the inherent power imbalance between a man and a woman is vast enough that these direct comparisons just don’t work. There is no symmetry. This general point relates tangentially to my line of work and all I will say - and it surprised me when I saw the data! - is that the strength gap between the two sexes is larger, not smaller, than most people assume. So much so that almost all men are stronger than almost all women. It’s actually quite remarkable.
That’s why things like “soaps trivialise it when a woman slaps a man’s face but if the sexes are reversed it’s abuse” are basically just fatuous. In all but a tiny minority of exceptional cases, a woman slapping a man poses absolutely no threat to him, neither would a man perceive one or be scared. The same is just not true of the reverse. And having been hit by both sexes in anger… there is a world of difference, physically, between the experiences.