Visual art reminds me of music - it's an experience the listener has just as much as the performer. Not all who listen to Bach find it pleasant. No one appreciated impressionists at first either. Art, all art, is an attempt at an expression of some truth about the world. If it isn't that, then it isn't art. How well it lands (and usually with how many people) are just criteria for how we collectively decide what we consider a masterpiece.  

 I mean, I find Bach pleasant. And some art is truly just lazy bullshit, but I wouldn’t then classify that as art at all. If someone is truly trying to convey a universal message or simply create beauty, it is art. It is a masterpiece if it expresses this in a way that is universally understood and appreciated. 

 Well said, and agreed.