The body doesn't necessarily reset, it's more the case that as it reduces in size, it needs less fuel. The vast majority of the calories that we burn daily are from simply keeping your body alive, a far smaller percentage ~30% (depending on where you look) is consumed in exercise and just moving about on a daily basis. So if you diet with a low-ish calorie deficit, then at some stage you will reach a point where that lower calorie intake equates to what your body needs and the weight loss will stagnate, especially if you become more active in that time. Then you need to establish a new deficit and keep on going. The biggest hurdle is mental and changing your mindset on food and what you think your body needs.
There's an absolute bucketload of misinformation re dieting out there on the net, and some of it is regurgitated in here. No disrespect to anyone as I've been caught inside various diet philosophy bubbles over time and changed my opinions on many thing over the years. There's a number of people across the web that cut through the misinformation, the most vocal would be Layne Norton and he's worth a follow. Love him or hate him, you can't really deny what the science actually says vs the anecdotes that many cling to.
Stan Efferding has a really good video on youtube where he talks about dieting. He has his own diet, but he talks about diets in general. EVERY diet works if you stick to it. What you need is a diet that fits in with you, your life, your food desires to make it last