I was a child/ teenager. My diet was awful. Parents didn’t really cook, and to be honest they still eat similar today ( basically anything fast, microwaved or cheap). Hardly ever ate fruit or veg, or homemade or fresh.
Breakfast: huge bowl of mixed sugar cereal. Like golden nuggets, Frosties, coco pops
Lunch: marmite sandwich, wagon wheel, crisps like skips or monster munch, those pop straw sweet drinks. Ate pretty much the same at home or at school
Dinner: oven beige, beans, spaghetti hoops, more cereal. Roast at nans some weekends.
Snacks: just piles of sugary stuff. Unlimited snacks galore.
I’m amazed I have no dental issues, never had weight issues, and that I didn’t get scurvy!
I don’t eat any of the above now. Left home at 18, somehow learnt to cook quite easily, and usually eat a pretty healthy and varied diet.