>>131102944Okay, serious objective point: the actual issue is that most writers have no fucking idea how to write a working, functional relationship that is still entertaining, especially for the main protagonist.
All they can do is drama, drama, drama, to the point they become a completely of a dysfunctional couple.
And as much as some may try to make both equally wrong, the main characters can't be at fault so it inevitably fall back on the other partner.
"Just write a couple that work" is something they are simply unable to do.