The term "art consistent" implies that something adheres to a particular level of quality or standard within the realm of art. Antonyms for this phrase, therefore, could include terms that suggest a lack of artistic integrity or inconsistency in quality. Some potential antonyms might include "haphazard," "unpredictable," "amateurish," "uninspired," or "careless." These terms suggest that a work of art may lack coherence or adherence to any particular aesthetic standard. They also imply that artistic decisions may have been made without much thought or care, resulting in a piece that lacks a cohesive message or impact.