Most of it "works" just as well as a verbal description of a concept -- "You know what? I hate Christianity so much ... that ... that ... I just want to put a cruxifix in urine!!"
OK. That's sufficient. You've accomplished as much as you possibly can with that stupid statement. Actually going ahead and creating that "art" doesn't get you anywhere further.
I despise Modern Art.
The key word is "self-indulgent." Modern art is about the artist. He doesn't care if he communicates anything to the observer. He expects the observer to see the world as he sees it. He wants the observer to admire his vision and his cleverness. The last thing in the world he is thinking about is the whether or not his creation actually means something to the observer. If artists were great thinkers or inventors, there might still be something in these narcissistic productions that we could somehow find interesting. But more often than not, artists are nothing but glorified craftsmen. When no attempt is made to produce clever, attractive works that the viewer can relate to, the inevitable results from these mediocre minds will be, as you said, boring, predictable and pedestrian.