The phrase itself is everyday Japanese for saying something is not a complaint, and as a short audio clip it circulates mainly as a reaction sound rather than as a quotation from a named work. Its appeal comes from the gap between the words and the situation: the speaker insists they are not complaining while sounding exactly like someone who is. That tension makes it easy to reuse across memes, short videos and chat replies, where a few seconds are enough to set up the joke without extra context.