Maybe it's your diet that sucks. You cannot burn more energy than you consume and gain weight. You may not like the laws of thermodynamics, but that won't change them. You can blame weight gain on hormones, enzymes, insulin, a fat gene or sunspots, but that won't change the fact that you can't get something from nothing.
“Maybe it’s your diet that sucks.”
Maybe it is your understanding of biology that sucks. If what you say is true, no one could eat a lot and not gain weight (like some of my friends). And no one would be able to gain weight just inhaling while walking past a bakery (me). There would be no such thing as metabolic rates, which we can measure and see how they respond to diets. People getting insulin injections wouldn’t tend to gain weight unless they also started eating more.
Frankly, your constant appeal to the laws of thermodynamics reveal your ignorance of biology. I’m sorry but you look really stupid trying to apply rules of thermodynamics that you don’t understand to human metabolism - which you also do not understand or even observe.
It is true that starvation will eventually cause weight loss and death. It is also true that someone removed from a concentration camp often gains weight back. ANYONE can lose weight on almost ANY diet if it is severe enough. Big whoop!
The challenge is finding a LIFESTYLE of eating that allows an individual to lose weight and keep it off. And it is undoubtedly true that MANY find a lower-carb, higher fat approach works well. Many of us find intermittent fasting works very well.
Then there are people like you who blather on about thermodynamics and weight loss, showing no understanding of either. You are embarrassing yourself in public.
But...if you LIKE being stupid in public, have at it.