Oof, you just reminded me of something I hate about my aunt. She takes bulk buying to the absolute extreme, and will suddenly come home one day with what to me looks like 2 months worth of groceries. Over the course of the week she'll then cook them in huge batches, expecting everyone to just magically be able to devour everything every night, then complain why we have so much leftovers. Rinse and repeat. She's pretty rich though, so I can see how she doesn't care about waste or whatever.
If I were to run things around here, we would meal plan tf out of everything. From what food we eat on what day, to the rations per serving. I'll even account days where we just deliver fast food. It sound tiring to alot of people, but I honestly think I could pull something like that off. I just hate hate hate seeing precious food go to waste.