What do we mean by modern because even nutty theories on visual art know that now will be yesterday tomorrow, we therefore need a more modern word for being contemporary: we are older than postmoderns that is neo-modernists or hyper-modernists. Advanced artworks are made recently, but are labelled tomorow's art because futurism is now such an antique art movement.
"It was very disappointing for me finding what art world is, which is basically a business."
Art desire and artistic identity exist on a continuum, spilling over the neat labels we create to contain them. Artworks painting different pictures of life cannot be classified in a style without constraints, at the cost of a significant loss of information.
Given that newer-is-better is an old and dusty point of view, why not turning to older-is-better for a more trendy taste? Ernst Gombrich has a book for you (The Preference for the Primitive).
They despise my modernity, I condemn their modesty said Piranesi