Additionally, nutritional needs for fat soluble vitamins is supported by WHO
I never suggested you don't need fat-soluble vitamins, I suggested that vitamin deficiencies aren't the main cause in a sharp worldwide increase in obesity. From the abstract of the Cambridge paper, they only say that vitamin deficiency and obesity are correlated, and then speculate about one potential casual link. But like, the kinds of modern diets that produces obesity are traditionally missing vitamins so, it could easily just be that eating a family-size bag of Cheetos for a meal will leave you fat with malnutrition.
Here's another study showing DDT causes obesity:
Interesting study! I haven't read all of it, but this one is certainly higher quality than the other. Even this study doesn't try to claim it's all DDT and other pollutants. Still, I haven't gotten to a part where it tries to estimate an impact fraction from this and similar effects, if there is one. Measurable and meaningful are two different things.
Let go of your eating disorder and self hatred and learn
I'm not insulting you, please don't insult me. I'm here to make sure acturate and reasonable information is what we agree on, and you came in here with a theory I'd never heard of before, of course I'm going to question it. The onus is on you to make a compelling case. Regardless, supposing it is environmental pollutants making people fat (and I am convinced the effect is worth further learning on my part) it is still better to be a healthy weight. It sucks that it's harder than it used to be, and we should really not be fucking up the planet, but when it comes to taking care of your individual health, you should still aim to be a healthy weight.
I didn't bother looking at any of your other links, by the way. Drowning someone in citations and then making fun of them is a terrible way to convince them of something. I might eventually go back and see if any of your other links are any good, but probably not. I'll probably do my own literature search and see if I can get an understanding of the current opinions and when they last changed, if they have.