Why do canteen food still taste like 'canteen food'?

I just had canteen food after quite some time. Sad to say, canteen food here tasted almost the same as the canteen food I had back in my school days.

As an educator (I'd like to call myself a 'communicator' as I find myself communicating more than educating) sometimes the schedule is just too packed you barely have the luxury of a proper lunch break, usually off campus, and today was one of those days.

Grabbed a ham and eggs with margarine sandwich and tried a sausage with margarine sandwich. Mayonnaise-free sandwiches are really dry!!! Healthy? Not so sure about that as the egg was fried instead of boiled then scrambled. The meat was fried as well. The bread was really dry. My first and the last eating or grabbing food from that canteen!

Shall stick to the more expensive campus cafes next time!