I flew a lot, mostly for work, over 2020. While things are slowly returning, I saw a lot of "food" similar to that last year.
For a while, AA would basically give you a paper or plastic wrapped lump labeled just "protein", and it was your first class main course.
Delta, up until quite recently, served a "box lunch" in First, if you were even lucky enough to qualify for that - just a lousy sandwich and some shelf stable snacks in a cardboard box.
The "drinks served in plastic" that is griped about on here, certainly applied to all the major domestic carriers as well.
Lots of and lots of domestic flights, even midcons and longer, with no food or drinks at all last Spring and Summer, then very minimal drink selection and snacks coming back later on, etc - which meant more cardboard boxes filled with random junk food.
I started travelling with a refillable bottle, flavored drink mix packets, and lots of nonperishable snacks. Also helped when arriving to a new city and discovering restaurants closed, stores with long lines, etc.
Bedding/pillows not being supplied on lieflat/redeyes. No amenity kits. Lounges closed.