Avram, there’s no point in making diyukim and speculating on a poster’s sinister intentions.
You wrote, “two wrongs don’t make a right. One spouse acting badly does not validate the other spouse acting badly”, and you are 100% correct, even considering both spouses equally.
I also agree that there could be underlying issues which can be difficult to articulate. However, this could go either way, it’s not husband or wife specific.