unsatisfactory (adj.)

• amiss
• bad
• bum
• crappy
• defective
• deficient
• disappointing
• disheartening
• displeasing
• dissatisfactory
• failing
• faulty
• flawed
• imperfect
• inadequate
• inappropriate
• incommensurate
• incompetent
• incomplete
• inferior
• insufficient
• lacking
• poor
• punk
• rotten
• tantalizing
• teasing
• unacceptable
• ungratifying
• unqualified
• unsatisfying
• unsuitable
• unworthy
• up
• wanting
• weak
• wrong