The phrase "found appealing" suggests that something is attractive or interesting. Antonyms for this phrase could include "unappealing," "unattractive," "boring," "dull," "tedious," "drab," "repulsive," and "disgusting." These words imply the opposite of finding something appealing, as they all connote a lack of interest, excitement, or beauty. When we use these antonyms to describe something, we are indicating that it does not hold our attention or capture our interest in any way. While beauty is in the eye of the beholder, "found appealing" and its antonyms are subjective and vary from person to person.