I ordered one of those five gallon buckets full of survivalist freeze dried food, once. And then once I had it I started doing math with all the ingredient labels.
It had a wide variety of meals, pasta with sauces and vegetables and textured vegetable protein, rice with sauces, etc., soups, bunches of different entrees.
And for breakfasts it had oatmeal and granola.
Looking at the labels, I noticed that most of the entrees didn't actually have very many calories. Looking more closely, I saw that none of the meals had very many calories. As in less than 200 for a meal.
Doing the math, it turned out that these meals provided less than 1200 calories per day, and two thirds of that was in the oatmeal and granola for breakfast.
Oatmeal and granola store well, with refrigeration
or fancy packaging, and are available in bulk at a tenth of the cost of these prepared survivalist foods.
So I've never bought survivalist food since.