I think the moving away behaviors are due to irritation/resentfulness over his feeling of impotence. Saving her has not worked the way he has been trying. He has compassion fatigue.

I would say there is actually probably also an element of wishing to punish in the countertransference, as well. Wishing to punish for allowing herself to remain in this situation even though she's "smart" and "should be able to figure it out" or whatever it was he said. I think part of him wants her to regret not listening to him or something. For her to have one of those "come to Jesus moments."