Canned peas are terrible.

Canned mandarin oranges (Google turns up no results for canned tangerines?) are actually an essential ingredient in quite a few recipes, well unless one wants to peel a bunch of tiny orange wedges by hand.

Canned Vienna Sausages likewise have their place, rare as that place may be, and there are actually higher end canned brands that are rather edible.

So, fun fact about sense of taste over time. Kids have a more sensitive pallet, food tastes super strong to them, so it is often more bland or has simpler flavors. This is why kids can't eat lots of bitter or sour things, they taste really bitter or really sour. As we grow older, our sense of taste starts to die out, and so flavors are less intense. This means overpowering flavors become less overpowering, and we can taste more "refined" foods. And we can also tolerate pickles. (See: Tendencies for older adults and red wine[1])

Exact same goes for our sense of color and taste. Again, as we get older, brighter colors, and stronger perfumes become preferred.

Back to food, simple kid foods either taste bland, or have one dominant flavor. In American famously it is mac and cheese. The texture is simple and the flavor is simple.

[1] IMHO most red wines taste horrible, but at a certain age we just can't taste how horrible they are and they become tolerable.