THESAURUS
unappreciative
against, con, disappointed, disapprobatory, disapproving, discontented, disenchanted, disgruntled, disillusioned, displeased, dissatisfied, dissenting, indignant, low, opposed, opposing, poor, thankless, turned-off, unapproving, uncomplimentary, unfavorable, ungrateful, unhappy, unmindful, unthankful
