The reason one needs to examine the abusive relationship is to understand how it happened. To see the manipulations, to see how one was led into the disaster.
Most important, unmask the Abuser. Exposing the Abuser to reveal how it was done, protects the victim from repeat performances.
Many women bounce from one abusive relationship to another because they don’t analyse the first. They don’t go day by day, action by action to see how it was done.
For example, Nick would goad Sandy and keep going until she cracked. Then, he would beat her.
Years after she escaped the relationship, when she examined a particular beating, she perceived how he had gotten her angry so as to give him his excuse to beat her.