The act of returning a meal you bought when there's an issue seems to register differently for different people. I, personally, find it to be a humiliating experience and try to do it as little as possible and only if things are catastrophically bad.
The people on this list, however, are a little more lenient. A post in the Reddit community r/KitchenConfidential asked for the strangest reasons people have ever sent meals back, and these were some of the answers.