My Barred Rock who was flogged repeatedly by what was a decent rooster to the rest of my flock is more or less permanently terrorized by her time with him. Sounds like similar or the same, maybe she did not submit to his standards at first? Who knows, she was submitting in the end and he kept...
Get rid of that rooster and find a nice one who will not flog her. Shame on him. Bad roo!!!
In my experience this will not get better only worse. He is probably a great roo to the rest just not a great roo for your flock.