Question for people who have trouble losing fat (this was never my problem): have you ever tried instead of dieting to just force yourself to eat more fruits, vegetables, and protein daily while also allowing yourself free range in the remaining appetite room to have whatever? The human mind/brain/whatever doesn't do well with deprivation of a high dopamine reward, but what would happen if you started to shift your tastes by insisting that it get used to a more healthful diet as a precursor to getting what it wants?
I ask this because when I was younger, I also had tastebuds warped by hyper-palatable foods, but after incrementally getting my diet to such a clean and optimized place, I literally feel bad even while chewing and tasting something like a donut, heavily salted and oiled potato chips, or candy. It's probably like how I would have felt if I literally mixed a tablespoon of oil and sugar or salt together and swallowed it.
Is it that hard to shift the system toward better habits by incremental introduction of better ones, and crowding out the bad? Exercise helps here, because once you begin to enjoy fitness, you get a stronger feedback loop with the bad food creating bad outcomes.