I think you might be getting caught up on wording.
I think most would agree he was a victim of being cheated on and she was a victim of being neglected. I guess it's up to an individual person which is worse, irredeemable, or a deal breaker, or if they hold equal weight in terms of moral reprehensibility.
Did you not just read the last few pages? There are plenty of people who don't think he did anything wrong. And that still did not answer my question.
I am asking for personal opinions not a round about "it depends."