I've watched a little of it. People keep saying they are both as bad as each other. But while JD admits to drug taking, excessive alcohol, losing his temper at inanimate objects and getting into rows with her, AH admits to hitting him, and he accuses her of far more than that (throwing a bottle at him which severed his finger). For example there is a recording of her saying she didn't "punch him" but only "hit him", then telling him to grow up when he complains about it.
Yet he lost a lot of his career over allegations and she hasn't, until now, seemed to suffer much impact to her career. Double standards much?
It will be interesting to see her evidence and whether there is any merit in her indirectly accusing him of being an abuser. I guess we will need to wait and see what comes out.