disconcerting
exasperating
infuriating
maddening
off-putting
upsetting
vexing
abhorrent
annoying
bitter
bothersome
disagreeable
disappointing
disheartening
dislikable
dissatisfactory
distasteful
foul-tasting
had
ill-flavored
inadequate
incommensurate
insufficient
intolerable
irksome
mislikable
not good enough
odious
offensive
rotten
sour
thankless
ugly
unalluring
unappealing
unappetizing
unattractive
uncongenial
undelectable
undelicious
undesirable
unengaging
unenjoyable
unfulfilling
ungratifying
unhappy
uninviting
unlikable
unlovable
unpalatable
unpleasant
unpleasing
unsatisfactory
unsatisfying
unsavory
untasteful