I'm watching now and to be fair, all the comments about her being a princess and not nice etc, are exactly what I was like when my 2nd born was about Margot's age. the sleep deprivation & juggling family life with other kids was getting to me and I was taking it out on my husband.
just showing another side as she obvs cried on the same day at Sue's house when she was over for lunch about Arthur so while I'm not saying she's an angel, I think we can give her the benefit of the doubt that it was just a bad day? regardless of wealth or anything else, we all have bad days!