Every post in that sub falls into two categories:

1. Fake
2. "Adults" who somehow never developed basic communication skills and have a falling out that is 99.9% the fight that that had been lurking below the surface for months/years and 0.1% the instigating incident.

But as a general rule, while the other person may also be an asshole, the poster is always an asshole. Anyone who responds to personal conflict by running to Reddit for affirmation has a critically flawed personality.