displeasing (adj.)

• abhorrent
• annoying
• bitter
• bothersome
• disagreeable
• disappointing
• disheartening
• dislikable
• dissatisfactory
• distasteful
• inadequate
• incommensurate
• insufficient
• intolerable
• irksome
• odious
• rotten
• sour
• thankless
• ugly
• unappealing
• unappetizing
• unattractive
• uncongenial
• undesirable
• ungratifying
• unhappy
• uninviting
• unlikable
• unlovable
• unpalatable
• unpleasant
• unpleasing
• unsatisfactory
• unsatisfying
• unsavory
• unwelcome
• vexing