I don't know much about ND, apart from the fact she is an ex nurse and supports BJ.
The fact she is constantly derided in the press makes me suspicious that someone, somewhere is doing a hatchet job along the lines of 'this middle aged woman is mad and sad etc etc' so ignore her. That alone makes me take notice of what she has to say because ageism and misogyny have been used forever to discredit middle aged women.
People who have been following politics closely will know that nadine dories has been very incompetent at her job, spectacularly biased towards Boris, very neglectful of her constituency and has given interviews in which she can easily be judged to be not very clever, rude, aggressive and often ignorant of the facts.
I would turn it around and say that she is perpetuating the stereotype of an old, mad woman. A bit like David Frost helping middle-aged white men to be thought as gammony tossers. Which of course they are not. Just like most middle-aged women aren't barking.