I grew up in the 50s and 60s and rarely ate any of that awful looking stuff! I never had a jello mold until I was in college and ex MIL made one. Never even heard of Spam until same ex-MIL had it in her kitchen. I think this was a regional and cultural difference. This woman also had a can of lard on the kitchen counter, which made me gag when I looked inside.
We ate lots of broiled chicken, steak, pork, baked potatoes, pasta, a lot of fruit, and salads. Sandwiches for lunch. Sure, maybe the pastrami wasn't so good for you, but at least it was real food. My mom was a really good cook and really explored ethnic foods as she got older, after I left home. Both my brother and I love to cook.
I do get amused at the breakfasts I had sometimes. Sugared cereal with a danish . But we also had french toast, oatmeal, and pancakes.
I do remember having Twinkies and Devil Dogs, cupcakes in the house all of the time. Never drank soda with meals, just as a treat for Saturday deli sandwiches or lunch.