hypocritical
Describes a person, action, or attitude that pretends to be virtuous while hiding selfish motives. Often used critically.
彼の偽善的な態度にはうんざりだ。
I'm fed up with his hypocritical attitude.
It's hypocritical for a company to advocate environmental protection while continuing to pollute behind the scenes.
Compound of 偽善 (hypocrisy) + 的 (-tic, adjectival suffix).