I will put the abused kid aside and will assume non-abusive family. I will also put aside a kid that is about to go to foster care or something.

First, the kid is not and will not be without family. The kid is living inside a family. In the long term, the kid is supposed to be able to have family of their own. That requires both ability to communicate when they treat you bad without knowing it and ability to not treat other people badly. Long term functional relationships are not possible if you solve problems by hiding. That includes both spousal and work relationships.

I don't know why you went toward a kid that is without family. Because I was talking about kid that is impatient, reacts to IRL setbacks with temper tantrums or yelling or accusing people or picking on them or otherwise jerk behavior.

Your examples are like exactly attitudes that parent don't want the kids to get. Including the idea that historical kids rich enough to not have to work significant part of day would not be expected to learn a lot. There were periods like that, when middle class was strong and secure, but not calling it a norm where opposite is aberration is absurd.

> In the long term, the kid is supposed to be able to have family of their own

Or not. Who said everyone want to have a kid?

> I was talking about kid that is impatient, reacts to IRL setbacks with temper tantrums or yelling or accusing people or picking on them or otherwise jerk behavior.

So? that's not an illegal behavior as far as I know.

Im more open minded than you about what should be a family, I don't see long-term relationships that much important, and I believe in a society where everyone can have the life they want. If they prefer short term relationships, I don't see this as a problem, but a personality trait.