The closest you can really get to objectivity is to observe which patterns of attributes tend to correlate well to people saying that that piece of media is good. In the end, "good" or "bad" is just my emotional reaction to receiving a piece of art, and there's plenty of art that have all of the usual attributes I associate with good art that leave me completely cold.
I prefer to ask whether a piece of art is "effective" or not. An EDM club banger, a classical piano sonata, and a rap battle are all trying to achieve very different things with valued qualities coming from their various subcultures, so ask what the artist is trying to achieve (intricate composition, or shifting units etc) and judge it only in that context
I prefer to ask whether a piece of art is "effective" or not. An EDM club banger, a classical piano sonata, and a rap battle are all trying to achieve very different things with valued qualities coming from their various subcultures, so ask what the artist is trying to achieve (intricate composition, or shifting units etc) and judge it only in that context