If you think that is the worst advice in the world, then your narrow view on reality is going to get very harsh when you grow up. I don't know where you got your made up facts from either since have never read anything in any APA journals that would indicate such a thing. Also you took an idiom as something literal which is concerning for your mental health, it's been almost a month so hopefully you are in a better place now.
MOZ said it well, the longer a marriage goes on the the more the couple learns to pick their battles since 99 percent of arguments don't matter really. Also sometimes a couple just has to argue to get it out of their system, unfortunately usually only one member of the couple needs to get it out of their system at that particular time so it's usually not the best, but a certain amount of it is needed otherwise resentment can build. Long as you apologize and make up later that's what's important.
Concerning the story, my goodness the translation is just making things so dumb, I get used to it in stories but sometimes it's just bad.
