No, pizza once in a while isn't a horrible thing. But I remember school lunches, and breakfast. Whatever was the cheapest and easiest. I ate breakfast at school and all through high school every day they served 'super doughnuts'. They were pre-packaged doughnuts enriched with nutrients. Though, once in a while we got pop tarts or funnel cakes. Yes, you read right, my school served funnel cakes for breakfast.
Every Friday was pizza. They did serve a little bowl of lettuce and called it salad. Then it was things like grilled cheese, burgers, chicken patties... The one good thing they did do was you could order a chef salad in home room.
I do remember once they made turkey wraps a few days after they served turkey hoagies. Pretty much everyone who ate them got sick. I have a pretty good idea why.