It's hard read these stories and not wonder about the parents. At the same time I'm often drawn to the story of my high school buddy's youngest sister. His family was as normal as you might expect, the kids were perhaps unusually "driven", but in good ways, music, athletics, academics, all three even. But the youngest was driven to rebel in the most distributive ways possible, the usual running away from home, older…
You have to realise that children have genetic wiring for survival. If their parents are neglectful or abusive, the child cannot simply go on to the free market to shop for a replacement. Rather, they are much more likely to become increasingly compliant, in order to extract as much care as possible from the defective parent. Mild forms of this can involve the child performing very well at school, or in sports, once they realise that love is contingent on performance. Children who feel invisible might act out because negative attention is perceived, perversely, as a workable substitute for love.
Over time, the roles in narcissistic family systems can change around: the golden child can become invisible, or the black sheep, or vice versa. Humans are at the same time as being quite vulnerable to abusive and neglectful environments, also incredibly resilient to them - finding coping strategies which work, even if they can appear to be incredibly destructive, self-destructive, or totally inexplicable to someone lacking the full context.
There is a book called "The Narcissistic Family" by Stephanie Donaldson-Pressman which describes the dynamics that can occur in these sorts of family systems.