Do you have a fridge in your dorm ? My D hated the dining room food but could use her dining dollars to buy cereal and fruit at a take out section of the cafeteria. So she would eat cereal in her room.
If you can afford to order some protein bars delivered? Or drinks? Amazon has all kinds of stuff.
Appeal to your relatives -Many people love baking and making care packages
Join clubs and organizations. Does your school have a reddit? Start a thread and ask -what clubs are giving out free food? I understand at my D’s school there was almost some organization having Pizza somewhere.
Make friends with someone on the dinning hall staff and ask if they will make you something in a particular way.
Good luck!