The phrase "art moonstruck" might suggest a sense of creative madness or inspiration, but there are a variety of antonyms that could be used to describe a lack of artistic passion or inspiration. Words like mundane, ordinary, or prosaic could convey a sense of banality or everydayness. Similarly, words like uncreative, uninspired, or unimaginative suggest a lack of originality or freshness. Other antonyms might include plain, simple, or straightforward, which describe a kind of clarity or directness that might not be associated with more artistic or fanciful endeavors. Ultimately, the antonyms for "art moonstruck" reflect a lack of imagination or creativity, but they might also suggest a kind of grounded practicality or reliability.