We actually had to hire an attorney and file a restraining order when my daughter was in her teens. The guy was creepy and would follow her and I when we were out which was stupid on his part. She knew he was bad news but still she was emotionally caught up with him and too young to really know what to do. I knew he was trouble from the beginning, but at that age they don't want to listen and don't want their hearts broken.
I have seen that, too, but instead of the restraining order took a more basic approach. I knew the police were after him. After they had removed him from the equation, I informed a local (neighborhood) officer that If I saw him before they did, they wouldn't. I guess that got back to him, because he hasn't been around.
The longer she was away from him, the better she got after that, seeing the damage he was doing more clearly.
It's often something that can be done without police involvement (my preference), but you have to gently open their eyes to the toxicity inherent in the relationship, and I can point to the fact that my wife and I have only ever had a 'raised voice' argument a couple of times, and never, ever, come to blows. That is something we define as simply unacceptable and an immediate deal-breaker (her first husband was notoriously abusive). Her grandmother showed her the way out of that. Now, that mantle has been passed on to us.
It isn't always women who are abused, either, and I managed to get my youngest grandson to see how emotionally brutal one girlfriend was to him at the ripe old age of 15 (we're talking some sick crap). She was a pretty, cold-hearted, manipulating, wench, who learned at her mother's knee. (there are tales to tell, there) I have no use for either of them, but when I got him to look at it, he realized just how bad it was and broke it off with her. He is older now, wise beyond his years, and likely to marry his girlfriend of the past two years, with my blessings. They are good for each other.
"Patriarchy" is so much fun. Not what the feminazis portray at all, but then I'd be depriving them of some fellow to torment, or some victim to parade, so no wonder they'd resent that. Sadly, there are too many out there as it is.