So what do you make of my experience? For background, I used to live in an apartment in an otherwise-wealthy and desirable neighborhood, and worked at a grocery store. Within several blocks of me, there were three different well-to-do families that adopted daughters as infants from troubled backgrounds, probably with drug-abusing birth mothers.
One daughter worked at the same store I did. She regularly called in, or otherwise didn't show up for work. Her diet was atrocious, she was always fighting with certain other employees, and eventually got fired for swiping her employee badge to get the discount for any cute guy who'd talk to her. Not the sharpest tool in the shed, or the most ambitious. Her sisters, though, were star students, and went on to attend Ivy League schools, and got high-powered jobs.
The 19-year-old daughter of another family moved into the apartment across the hall from me. Her parents paid the rent, because she would fight with her mother constantly at home. She couldn't keep a job, even at the co-op across the street (absenteeism, again). She kept a string of pets that she couldn't take care of, eventually a rabbit that she tortured by leaving alone for several days at a time while she was staying with her 50-something boyfriend. One time, she met a homeless man, and let him move into the apartment she wasn't using (without informing our landlord). While she lived there, I had a chronic problem with small flies in my apartment, no matter how much I cleaned. When my landlord finally evicted her, he threw out the refrigerator, because it was caked and crawling with maggots. (The flies went away.)
The daughter of a third family, a friend of my landlord, got involved with a troubled young man, another student at her school. They hatched a scheme whereby he'd rob her parents, but the robbery went wrong. He shot them and left their bodies by the side of the road in a nearby wooded area. Same deal as the first family, though, her siblings were well-behaved, and good students.
These particular kids were problem children, although raised in exactly the same environment as their siblings, by the same parents. They had love, wealth, good schools, close involvement in their lives, lots of activities, medical needs attended to, et cetera, et cetera. What more could any of these couples possibly have done? In contrast, most people who have abusive, neglectful parents turn out to be responsible citizens, despite their emotional turmoil. Bottom line, I don't buy the "bad parenting" explanation. There are way too many holes in it. What would better parenting look like, exactly?