I would break it down into classes
A. scarcity. (mountain regions, islands, stations)
You're going to get some kind of high density canned shit, tushonka, rendered fat, strange flours, dried meats.
B. time poverty (subsistence farming regions)
Plenty of food but no time to cook, everything burned or boiled.
C. food deserts (major industrialized centers, capitalists dead zones, resorts)
Here the market is artificially constricted by commercial entities where a monopoly has forced out all that is fresh, tasty and decent.
Genuinely the worst places are those where food has to be brought in, and rich people compete with poor people.
What the staff eat at resort islands or cruise ships is heartwrenching, to serve salmon and lobster to guests and to be forced to eat rice and some muck for every meal.
Base camps on mountains, where rich tourists demand retarded food- so there is not enough space to airlift in what the workers need to survive
It is not uncommon for these workers to deliberately fatten themselves before the season starts in anticipation of the hardships which will follow