He portrayed himself to be a really straightforward, hardworking person that always keeps their word, always shows up and is on time when they make plans, but turned out to be completely the opposite of these things. I need a synonym for these things.
The sentence I want to use is:
"He turned out to be a douche"
(but I need another word/words or a phrase to put there that means exactly what I'm trying to say and not one that has such a wide array of contexts or meanings.)