Playing devil's advocate: an enormous amount of food waste is caused by people simply refusing to buy ugly food. It's literally less wasteful to shave off most of a carrot so that it's a baby carrot, than to try to sell the same carrots as-is. There's nothing wrong with the ugly carrots--but they'll rot on the shelves.

Bruised apples are perfectly edible. Maybe you just don't like them, and that's fine--there's no accounting for taste. But I don't think it's outlandish for someone to give you a bruised apple.

Broken bones in chicken aren't harmful--the traditional way of preparing jerk chicken involves chopping the chicken with a knife that just cleaves through the bones. Again, your preference here is valid, but it's your preference, not something that's objectively better.

And these are some of the less extreme examples--being involved in my local CSA, I've heard people complain about potatoes with dirt on them, and literally heard someone refuse to buy eggs because they farmer got them from her own chickens. A lot of people's preferences around food aren't just arbitrary, they're downright illogical.

Substitutions and expired food are obviously problematic--there's lots of room for delivery services to do better. But I am not convinced that the average person does a much better job selecting their food based on "quality".