One insidious thing is that it's incredibly easy to do food tracking if you eat mostly single-serving prepared foods, but those are, by nature of being incredibly palatable and digestible, the most psychologically and metabolically challenging foods to maintain a calorie deficit with.
yeah, although there's a variety there and you can find some lower and higher ones. (bags of anything starchy are difficult, sandwiches are very variable.. I leaned on wraps and stuff like Chicken salad without toppings a lot.)
some prepared foods are basically the "empty calories" that people always talk about, like chips. high calorie (and usually like 3-4 servings per bag, not single serving really at all) and also low satiation so they almost make you hungrier to eat.