So True! I had a friend of nearly fifteen years. When I met her, she was going through a divorce and was unhappy. Within a year, she had met someone else, got engaged, got married. Unfortunately, her husband had cancer and passed away. I must mention that her husband was a great guy, very good to her. After that, it seemed that whenever I spoke to her she was dating the worst kind of man possible.
One of them was so awful to her that I tried having a talk with her about her choices. I couldn't understand how she could go from the nice man her husband had been, to consistently taking up with such poor choices. I soon realized that being mistreated was something that was fulfilling a need in her, and I stopped wasting time advising and encouraging her. I figured that if she was in her fifties and hadn't learned self respect, it likely was not going to happen.