You need a comma after wish.
I like most of the food my school serves
I'm not gonna waste my wish on school food. Sorry.
My school has pretty good food this year.
Ours is getting worse and the portion sizes are the same size as the elementary school's.
That's why I bring my own sandwich.
I liked my school's food. That was good stuff!
The pizza is pretty good, except for when it's cold/dry/has too much sauce/burnt
But sometimes it tastes better than a pizzeria.