Not sure why it caused outrage, when, as you say, there is a constant range of 'provocative' art images that regularly appear in social media.
I am the first to admit that I do not understand cast swathes of art, but am happy to concede that this may be a failing on my part in receipt of the image, rather than that of the artist concerned in creating it.
That said - this just looks nasty and tacky, and unless there is some 'irony' intended, but not clearly expressed, I am at a loss to know what reaction is intended.