depending who you ask, even the greatest art is considered boring by many, many people. Art is boring if you do not invest in it. Mathematics is boring if you do not invest in it, if you do not try to learn and understand it. Once you have done your investment, you will find that Mathematics is quite interesting.
This is true to some extent, of course. But it's a slippery path. Because if you do an effort and stare at a blank wall for over an hour, you'll probably also experience something deeply meaningful.
Also, art experience cannot be learned explicitly, I think. You need to have grown up in a cultured context. If you haven't, you're probably pretty much lost. Or it will take an enormous amount of effort.
I also fear that the sensitivity required to appreciate art may be in part genetic. Much like some people are better runners, some are more intelligent or have blond hairs, some simply have a larger capacity to enjoy art.
That being said, we do currently seem to live in a culture that rejects complex forms of amusement (like art) in favor of simple fun (like games). This is almost expressed like a political right: the right to be stupid. So, probably, many people with the genetic capacity and the cultural background required for the enjoyment of art, may end up rejecting it because that is the right/popular/cool thing to do.