Antonyms of complimentary :
uncomplimentary, deprecative, sneering, deprecating, dyslogistic, deprecatory, paid, dislogistic, slighting, pejorative, derogative, depreciatory, depreciative, snide, derogatory, belittling, supercilious, disparaging, captious, carping, caviling, censuring, critical, faultfinding, hypercritical, overcritical, contemptuous, disdainful, scornful, adverse, disapproving, inappreciative, negative, unappreciative, unfavorable, unflattering, unfriendly, costly, dear, expensive, high.
Examples of usage:
I remember I gave you and your mother complimentary tickets to the lecture. "Gigolo", Edna Ferber.
Boswell opened a letter from some person in the North of England, of a complimentary kind, and thinking it would fatigue Dr. Johnson to have it read aloud, merely observed that it was highly in his praise. "Father Payne", Arthur Christopher Benson.
I'm afraid I wasn't over- complimentary at the moment, but I've had time since to appreciate her tact and presence of mind. "The Bars of Iron", Ethel May Dell.