I think art absolutely has an objective element. Mozart is objectively technically better than some randy small-time composer, regardless of who people enjoy more. I’m comfortable saying that Beethoven is objectively better than The Weeknd, while typically enjoying the latter more. In other words, I think the subjective element is “enjoyability”–i.e. the pleasure that a piece of art gives. Most of the other elements can be measured objectively, I think.

Of course, what makes art objectively good or bad depends on your defenition of art, which many would say is subjective. I would tend to disagree, while acknowledging that practically speaking, it’s not easy to come to an agreement on what makes art good.