uncomplimentary

adjectives

showing or representing unfavorably
"an unflattering portrait"; "an uncomplimentary dress"
uncomplimentary, unflattering
tending to (or intended to) detract or disparage
uncomplimentary
antonym
complimentary
is similar to
tending to diminish or disparage
"belittling comments"; "managed a deprecating smile at the compliment"; "deprecatory remarks about the book"; "a slighting remark"
belittling, deprecating, deprecative, deprecatory, depreciative, depreciatory, slighting
is similar to
expressive of low opinion
"derogatory comments"; "disparaging remarks about the new house"
derogative, derogatory, disparaging
is similar to
expressing disapproval
"dyslogistic terms like `nitwit' and `scalawag'"
dislogistic, dyslogistic, pejorative
is similar to
expressive of contempt
"curled his lip in a supercilious smile"; "spoke in a sneering jeering manner"; "makes many a sharp comparison but never a mean or snide one"
sneering, snide, supercilious
see also
not encouraging or approving or pleasing
"unfavorable conditions"; "an unfavorable comparison"; "unfavorable comments", "unfavorable impression"
unfavorable, unfavourable