She's just on her merry go round of diets. She'll never lose the weight because she lacks self control and will power. She will blame absolutely everyone else (her trolls) for her lack of weight loss, not the large portions, extra McDs, excess carbs & lack of real exercise.
You only have to look at successful people on SW, WW or CC that it is achievable, if you want it. Unfortunately for Diane she just wants adulation. This imploring for diet buddies, which she'll ignore, hurl abuse at & finally block is yet another of her obsessive ways.
Diane needs professional help, preferably in a clinic that restricts food and social media.
There cannot be any 'peeps of the world' left who actually think she will or could be a dieting guru.
I wonder if she has a dart board up in her hallway but instead of numbers its just has diets on it & everytime she passes she throws a dart at it...