I find what people write online here absolutely ridiculous.
First of all, how can you become this blaming couple when things go pete tong ? Plus, how can you sleep with someone on the first go or very early on in the relationship without actually building up the trust and getting to know them ? i.e. emotional intimacies, and affections, and commonalities ? Also, how can people not realise it of themselves when they are on the rebound and is actually finding a new person to wipe the slate clean from a previous relationship (which means that you won't ever move on) ! How can people also dump others and not learn about themselves or about the other person just because they did not tick a certain box. They are still as human as you are. How can the OP write such ridiculous line as "she is a good mother, but a bad wife", and for him to dissect the difference and the duties of a wife to that of a mother ? She is still the same person, and will be both, but he treats her as one and not the other. Has he ever talked to her and gotten to know her as a person ? It means there is a big red flag here to begin with.
When I was younger, I dumped my ex already when he saw me as a demure baby machine being SE Asian and all that. He wanted a person to deliver a baby boy to him. I saw it a mile coming, and I ran away. Cos I wanted him to see me as a person with feelings. I also was not ready to give a baby to him. To me, that is decency. I cannot understand and phantom why others say that they are in an actual relationship or a marriage when in reality, it is hardly a steady relationship (but sits on hope and rocky foundations), and also on a lot of edgy risk. People seems to be putting a lot of "get out clauses" here and there, without actually reflecting on their own decisions and learn from the lesson and then do things better.
How can people say that they are in a marriage and did not consummate the marriage, this or that or the other, when it seems to me that the husband hardly knows what makes the wife tick ? What is her personality, and what does she prefers as intimacy. What does she like, and what are her preferences. All this "must do" and all these "expectation" and all this "she was intelligent, here and then, and when I dated her"...
To me it sounds all so much like a throwaway culture. "If this does not fit my mould then..."