If the goal of music is to induce an emotional or intellectual response in a person. Then only the listening person can decide if a response was induced and if that experience impacted them in a positive or negative way. It is the definition of a subjective experience.

The complexity of the music or the technical skill of the artist has nothing to do with it being good or bad. Music anywhere on the spectrum from simple ambient noise to symphonic formalism to simple and infectious can be good or bad based on the taste of the listener.