Feminism is not to blame for the breakdown of the family, except that it has encouraged females to think for themselves and be more independent and introduced moves towards equality between males and females.
Previously, especially in those so called good 'Victorian Times', it was the males as head of the household who made the rules and all persons in the household had to follow without question, even his wife.
Even if she was not happy with the situation, there was little she could do, as the male was in total control.
So couples kept together even though at least 1 may not have been happy, but in hindsight was this good for the family.
It is liberalism stemming from the 60's that has been instrumental, as this created a culture of withdrawal of discipline, leading to lack of respect for other individuals and Society as a whole.  In today's throw away culture, people do not care for each other and there is the attitude of 'I want it, it is my right'. This follows throughout life.