She's not a parenting expert, she's a nanny. That said, I think she comes across as a fairly reasonable person who likes children and I don't have a problem with her, even though my parenting style is diametrically opposed to her advice, and even though she offers inaccurate advice, such as breastfeeding a toddler has 'no health benefits'.
But I do take issue with the programme. My husband works in TV and we have a friend who has worked on these type of programmes (Channel 4 is awash with these edutainment/makeover reality shoes and they do not ever comply in any way shape or form with producer guidelines set down by a reputable organisation, such as the BBC)
Typically, they will come in to the house, advise the parents to withhold toys, keep them up late, delay their routine, or upset it -- all in order to capture as much 'bad behaviour' as possible. They will also antagonise the parents (even encouraging them to have a drink, can't say that's happened on this particular show, I don;t know) and get them to 'break down' and cry on screen. Cue a big shoulder to cry on from presenter.
All cleverly edited to show progression from nightmare to solution in two easy weeks. It's nothing to do with anything, least of all parenting.
Thing is, if someone wants to go under the knife, have their teeth fixed and hair done and cry a bit -- fair enough, they're adults.
But allowing your challenging child to be filmed for posterity at their worst (and all children can behave badly if goaded) for others' entertainment. Well, it's not abuse, but it's fucking wrong on many levels.