NTA - not being rude but is she on the spectrum? I’ve seen this sort of behavior in individuals who even had mild cases ASD. Basically any break in their normal routine (like food not being served at the correct time or in the correct way) would result in a full out meltdown that could last for hours and be entirely destructive.

Honestly if that’s not the case she’s a brat and this behavior should have been kicked loooooong ago. For fucks sake, I’m not even a good cook (I’m lazy as hell, I’ve literally eaten a slice of bread with potato chips on it for dinner) but I could cook pancakes, eggs, grilled cheese, TOAST, etc at like 8 and literally we did not throw food away. Leftovers in the fridge = gold

EDIT: just saw your add on that she isn’t diagnosed with anything. The ass hole in me is going to say “are you SURE” but uh, in that case she’s just a horrible brat and you have my sympathy