@finneass
I would go to your friend point out all the good and bad he has done to her. Judging from your pov - nothing good is happening.
After you point out all the good and bad - point out what might happen if thier relationship continues.
If she has had truama in the past - this is not good for her mental health…
stress is not good for her mental health
she needs to leave him… not all fast because he mad get mad and do something to her but she needs to cut off contact for awhile then if things continue - just leave him
I’m almost 100% sure he’s going to keep doing the same SHIT over and over again.