Since art is subjective, and there are many different styles of art out there, it is quite difficult to critique it. Of course, it is still possible to do so. Looking at an image, deciding what that focal point, meaning, materials, and how the principles of art were used, will help determine where the artist could do better. Of course, most of this is up to opinions, but it is also by comparing two similar artworks. Now there are artists who decide to change how they do their artwork, creating new techniques, or styles of art. Sure they may not care to have restrictions placed onto them, but in art, once out of classes and such, thee aren't very many, just what others expect of them. Artists that choose to use different/ unique techniques are simply exploring a little or finding more of their style. To some artists, they may not feel realistic or subjective art really calls out to them, so they may try abstract, or other types, or create their own form of art. It's not whether or not on how I feel about this type of art, it's up to the artist to figure out how they feel about their own artwork, for in the end, it's if the artist is proud of their art or not. With many different people in the world, who all like different things, an artist can never please everyone with their artwork, only the select few that do like it can they please. for art is perceived in the eye of the beholder.
hope this helps. it is correct in ed2020