The decisions are shitty, but when Abby makes them it is the "right" or "correct" decision, regardless of how morally superior it is. To the point where- from what I've come to understand from what I've seen and read concerning the game- she gets into disagreements with her 'friends' because she knows they're wrong and even though they disagree with her she knows she is making the "right" or "correct" decision and they just can't see it.
Which is the definition of holier-than-thou. At least according to what you've said, pretty sure?