Let's just say that the rules are very fickle and unevenly applied when it comes to violence against the spouse affecting the kids. I have had a few examples of truly dangerous abusive behavior yet have been told that it does not affect the kids visitation.
In my state you can't even get a PO without proof of physical violence. I think it depends on where you live.
"Success is the sum of small efforts, repeated day in and day out." Robert Collier
"One's best success often comes after their greatest disappointments." Henry Ward Beecher