This post is hilarious for what it implies but does not state.
He concluded that him doing nearly equal domestic tasks to his wife made his marriage worse. He does not disclose how it got worse or what caused it getting worse, only that he was forced to step up because of his wife's postpartum issues.
It is reasonable to conclude that what made the marriage worse is that he was not happy about doing these tasks, and viewed a near equal split as too much of a burden. He probably did not conceal this from his wife, who because of her medical issues, likely was not at all charitable (and rightly so) to his complaints.
This reminds me of the studies that show that men feel that women are equally contributing to a conversation if they talk 30% of the time, but if they talk 50% of the time, they are "dominating" it.
It also reminds me of the messy breakup I witnessed between two mutual friends. She told him she compromised so much for him, like forgoing lucrative overtime to go over to his mother's house on a weekly basis to help her with tasks her mobility issues complicated. His "compromise" was not cheating on her in a monogamous relationship, even when he "knew" a female coworker was into him.
Studies show that many men believe they do not need to put as much into a relationship as their female partner does. With that data in mind, the conclusion is that many men perceive equality to be a threat to the benefit they believe they are entitled to in a heterosexual relationship, and find the relationship itself "bad" the more benefit their female partner derives from it.
I don't think I need to tell reasonable people that judging your own relationship in such an adversarial manner was likely the actual cause of this man's dissatisfaction, not the house chores he was doing.
My marriage was never worse than when we were near equal on this metric. Scope creep due to some bad post-partum. One day I just stopped. I reverted to stereotypical gender tasks and nothing more.
Relationship resolved almost over night.