S.T.
i'm pissed on your behalf. like you, i've had too much experience in the restaurant business to be okay with this.
under certain circumstances (if i were a regular, if i knew the owner or manager) i might complain directly. certainly if anyone had approached me, as one might expect in an expensive trendy restaurant, and asked if things were going well, i'd take advantage of the opportunity to let them know.
but what i would certainly do is leave an online review at YELP and tripadvisor. and i check reviews before i go to a fancy restaurant. one time i did have a manager read a review after a negative experience and apologize. because of this i did go back, and while it's still not a favorite, i've never again had a poor experience there.
and what i would NOT do is give them another chance unless they do something to earn it. obviously that won't happen unless you communicate your dissatisfaction in some way, so if you want to go back, do pick a platform. but for the most part i figure there's always somebody else who actually wants my business badly enough to work for it, and i go find them.
khairete
S.