Ordering a lot for yourself doesn’t necessarily mean eating it all at once. Leftovers are good too.
That said, there was a time when I worked in a pizza place that sold by the slice. I had to predict what we’d sell 10 minutes in advance without creating too much waste or leaving customers waiting. Sometimes fat people would come in, order way too much, complain about needing to wait for more, and generally making my day worse. I realized I was starting to resent fat people and it was adding to my already miserable mental state working that shitty job. So whenever it came up I started playing baby elephant walk in my head, and I wasn’t so resentful anymore.
For deliveries, the only customers I judged were the ones who treated us like shit, lied to get free stuff, or who were terrible tippers despite clearly having the money.
All they had to do was not fuck it up. Just sit back, let the developers work, and collect the money. But apparently they thought they could make slightly more by ruining everything. Fucking morons.