Social worker enters. Meets confused young lady who a) doesn't know what day it is, b) has a shady guy visiting whom she nervously denies being her boyfriend c) lies about how many people are living in the house (a pretty basic question) d) has, by her own statement, "magic weed" in the house. At the time, probably a criminal offense in Cali.
Doris might have left soon, but she was not criminally negligent. Buffy is an adult, she is responsible to take care of the huge change, if you're not prepared to shoulder a huge change and to be responsible for a child - don't undertake it. She couldn't even tell what day it was or remember that they had an appointment. She showed what kind of guardian she was, and continued to be, like Doris said - in those few minutes, she showed enough of who she was and how she was taking care of Dawn. She was given an opportunity to explain, and she fumbled at the most basic questions. No doubt Doris, being with social services, also knew that they wouldn't be taking Dawn away from her family, they'd get in touch with her other family (her dad), so it wasn't as if she was going into the system or anything.
Sure, Buffy messed up. She wasn't ready for the visit, and she answered the social worker's questions very awkwardly. But the social worker's response should have been to GET TO THE BOTTOM OF IT, to find out exactly WHAT was wrong with the house, and WHY. That's what social workers are supposed to do - they're supposed to HELP families, not to TEST them. Recommending foster care is only a last resort, because children need their families, and they need stability.
By ending the visit so soon, the social worker essentially said that this house was a lost cause, and that there's no way of turning it into a good home for Dawn - and Buffy's behaviour was NOT on that level of incompetence. Forgetting what day it is is not an example of a hopeless parent.
And no matter how wrong Buffy's behaviour was, the social worker's response of "I'm outta here" was negligent. Even if Buffy WAS a lost cause, the responsible thing to do would have been to get to the bottom of it. This is a child's life at stake here, and it deserves that social worker's time.
And if Doris was aware of Dawn's dad, then she also knew that that dad was an even worse parent than Buffy - incompetent parents are bad, but absent parents are even worse. The most basic job of every parent is to be there when he/she is needed. Buffy did that. Hank did not.
No, I mean she doesn't kill anyone, but she's mean and thoughtless and rude, and the only reason for it is being invisible.
Uh... Being invisible, and ALSO being clinically depressed. I mean, jesus - in the end of the episode, Buffy is actually surprised that she DOESN'T want to die. Saying that she's mean because she's invisible is a huge over-simplification of her mental state.
But before that she lies to a social services lady - blatantly - for no reason. If she actually was a half decent guardian, she would have remembered the appointment, tidied the house appropriately (aka hidden the magic weed!) and when Doris arrived, she would have told the goddamn truth when asked about living with a friend (no harm in it) and having a boyfriend (again, what's the issue?)! That's what being a responsible parental figure is all about.
Doris wasn't negligent here - Buffy was. Doris simply saw a nervous, sketchy, possibly drug addicted young woman lying to her. Of course she's going to think the worst about Dawn's situation and take it further!
They were BOTH negligent. Buffy should have remembered the visit was supposed to be that day, and Doris should have actually taken the time to DO HER JOB despite Buffy's mistake. At the very least, she could have set another date for a visit. This is a family's LIFE, not a math quiz. The fact that Buffy made a mistake does NOT mean that the social worker could simply write her off like that.
Also, you're really exaggerating how bad Buffy's situation looked - the social worker saw Dawn when she arrived, and Dawn looked like a well-adjusted teenager, with clean clothes and everything. The house was messy, but still big and clearly well-supplied. Buffy didn't make the best impression, but she also didn't look like a total failure.