Synonyms for Vexing (same or very similar meaning)
WordNet sense 1 (extremely annoying or displeasing):
exasperating, infuriating, maddeningWordNet sense 2 (causing displeasure or lacking pleasing qualities):
displeasingWordNet sense 3 (causing irritation or annoyance):
annoying, bothersome, galling, irritating, nettlesome, pesky, pestiferous, vexatious, pestering, plaguey, plaguy, teasingWordNet sense 4 (not to your liking):
disagreeableFrom the ODE community, based on WordNetadd/edit