nettlesome
net-tle-some
adjective
Causing persistent annoyance, irritation, or difficulty; troublesome or vexatious.
"The nettlesome issue required careful consideration."
Thesaurus
Synonyms: techy, tetchy, scratchy, fractious, peckish, peevish, irritable, petulant, testy, cranky, ill-natured, pettish