Even on very low-carb, my weight loss stalls if I'm not accounting for calories in some way, be it calories, WW points, or (my personal favorite) food exchanges.
I can lose on higher carb, calorie restriction, but I'm hungrier and have to eat fewer calories than on lower carb.
I can't eat very low-carb or I get severe moodswings, blinding headaches, light headedness, vertigo, nausea - eventually to the point I have even passd out from hypoglycemia.
Finding the carb level that allows me to control appetite, lose weight, and avoid severe side effects has been extremely difficult, physically and emotionally.
My problem with all of the various weight loss theorists, is that they almost all argue that all or at least most people need to be on their diet, or one very much like it. The focus is always on a "one size fits all" approach, and I think that's why so much of the research evidence is contradictory and conflicting.
I suspect that stress, sleep quality and quantity, activity and fitness level, health history, fat and muscle compostion, gender, exposure to environmental toxins, genetic factors, immunity strength, water quality, substance use.... all impact on nutritional needs, and there is no "healthy diet" without taking these factors into account.
I think "balancing" a diet is more challenging and requires more effort than most people really want to invest (which may be why one-size approaches are so attractive).