"Art one's side" is a phrase that implies the presence of creativity and skill in supporting a particular cause or argument. However, there exist antonyms for this phrase, which negate the presence of art or skill in supporting a cause. One such antonym could be "unskilled argument", which refers to a baseless and weak argument lacking in creativity, imagination or skill. Another antonym could be "uncreative advocacy", which suggests a lack of any creative or imaginative approach in supporting a particular cause or idea. These antonyms highlight the importance of skill and creativity in advocacy, and the negative impact of lacking them.