Not necessarily. It is important to remember that water weighs ~1lb/pt and there are a lot of things that affect how much water your body is carrying at any given moment. Depending on your body mass, it is not unrealistic to see 5lbs of fluctuation in a single day. On a calorie restricted diet your body will tend to retain water (because it does this for pretty much any stressor), so you may actually see a slight increase in body weight at first even though your TDEE is above your caloric intake.
A more reliable approach, in my opinion, is to do the TDEE calculation for your target weight and set that as your calorie limit.
You can of course calculate the TDEE of your target weight but like you implied, unless you know your own, based on your own metabolism and intake, the data is never going to be accurate
For example I eat much less than my bodybuilder friends. When I went with the calories that they recommended to me I gained so much fat with a very active workout schedule and noone had a explanation why. Maybe it’s hormones, maybe medicine I take, maybe something else. I now eat much less than you’d expect from a person with my height and age, but I still gain weight, because my actual calculated TDEE is comparatively low
Having that data on hand as a reference is incredibly helpful to plan my weight progress
It's too bad that we can't just live on Soylent (the actual beverage, not the thing from the book)
On the low fat halloumi vs paneer thing... We also found that low-fat soft cheese (like Philadelphia light) are amazing in soups. Simmer lentils and cubed potatoes with some spices and a can of chopped tomatoes, and just before you serve, add a large dollop of light Philadelphia and stir it all the way in. Boosts the protein content and makes for a really creamy soup. Also works great in other soups.
Making the crust very thin is also an obvious way to reduce carbs, and using whole wheat crust also help, and using Khorasan wheat or similar whole grains.
For sweets, I adopted the snob diet: raise your standards so much the average supermarket chocolate bar just doesn't appeal any more, and you are less likely to snack casually :-)
I am going to experiment with low-flour dough with extra gluten and cauliflower to bulk it out. Might need xanthan gum and an egg.
> quality of eating habits within that period
To me this sounds like you aren't actually changing the amount of calories that you eat, just the quality of them. Eating 2000 calories of McDonalds or 2000 calories of high quality food does not matter (or barely matters) for losing/gaining weight. If 2000 calories is under your TDEE, you can eat 2000 calories of cheesecake and would still lose weight (but very unhealthy).
What I see often is people claiming stuff like "I can't lose weight" or "I have a slow metabolism", but they never actually bother counting how much they eat, and because of that have no understanding of what high-calorie and low-calorie food is. (For example if I'd ask how much calories an average hamburger or a glass of cola has, you'd likely have no idea if you haven't counted calories before).
It was the same for me, once I started counting I realized that I was not eating according to the goals I had set at that time, and that the food I ate was actually much much less in calories than I thought it was.
It’s a body recomp from an untrained person. Pretty common for new lifters.
You’re right though - if they lift better and eat better, that’ll change.
For example there are protein bars that are supposedly healthy, but they have 150-250 kcal per 50g bar.
On the other hand there are these watery ice creams that have about 65 kcal per piece and feel just as indulgent if not more.
Other things that are very much "not worth it" on the enjoyement/kcal scale is bread and other pastries.
2 buns with ham is 500 kcal and feels like nothing. A whole pan of hot vegetables with some meat is +- the same and feels like a proper dinner.
that shows why it’s easier for some than for others :)
Write down what you eat for a while and its calories. Weigh yourself daily as well and write that down too. If after a week your weight went up: Your calories are above your TDEE. If it went down: Your calories are under your TDEE.
And that's basically it, once you know what your TDEE is, eat under it to create a caloric deficit and you will lose weight. Even if you don't exercise at all and just sit at home.
Sure exercise will help putting your caloric deficit lower by burning some, but in the end it's always calories vs TDEE. Understanding that makes it very easy to go in either direction (gain weight vs lose weight), no matter what your metabolism is
(The easy solution is of course to just eat less, like skipping a meal or reducing the amount. Since your average daily food is already what dictates your current weight, reducing it means you will lose weight)