If you describe someone or something as exasperating, you mean that you feel angry or frustrated by them or by what they do. Hardie could be exasperating to his colleagues. extremely annoying
extremely annoying or displeasing; "his cavelier curtness of manner was exasperating"; "I've had an exasperating day"; "her infuriating indifference"; "the ceaseless tumult of the jukebox was maddening