So you’re supposed to stay married to someone who beats you to a pulp after getting drunk and/or high?
According to stats, only about 1/5 of divorces is due to abuse. That would mean that only about 10% of marriages would end in divorce, if that was the main reason for it.
In this case, the man was not divorcing his wife because of this. He was divorcing his wife because he chose to not honor the marriage and stay committed to her, despite that she was willing to stay committed to him even though he wasn’t being a full husband to her.
Marriage is bigger than an individual’s wants. It’s ok to not choose marriage, if you’re the type of person who considers his needs above other people, it really is ok to say no to the institution.
However, if you’ve chosen to commit yourself to another person, than being able to prioritize one’s path to happiness is over at that point. It is the other person’s needs that matters most, not yours.