Eat 1/3 of calories from protein (improves immune system, improves healing rate & mood, your blood has amino acid levels like sugar, respect them). Substitute simple sugars (2-10% thermogenic calorie loss in digestion which also correlates to low prebiotic value) for complex carbs (~30%). Eat more fiber. Just buy some dextrin it's a lot cheaper than produce.
Eat potassium (spinach, cabbage, potatoes, milk, oranges, NOT bananas you'd need 12 daily) and iodine and a multivitamin (lacks both in USA) so you stop feeling a weird craving for food that never can be satisfied.
former fatty here with a little addition: Also just eat less outside of your meals. Go diet in the supermarket by buying less, instead of dieting by not eating what have at home. You spend 20 minutes in the supermarket and multiple hours at home. It's MUCH easier to be strong for 20 minutes than for 12 hours.
What helped me kick the delivery services was looking at the cost of items when buying at restaurants vs ordering vs the apps. There is a huge difference. Like, a $45 order at the restaurant is around $60-70+ via the delivery apps (menu upcharges) then you have to tip on top of that. Ugh. Like your spending almost double the cost versus just picking up yourself, and at that point don't want to order any more.
That's basically all there is to it if you're not trying to get a six pack. It takes some time to get used to, but then your body will start figuring out things by itself (like '"I need more vitamins" and "I hate feeling bloated because of empty calories").