I have mentioned before how we had a bad visit to New Orleans. Usually I give a place a pass after one visit, but I really have zero interest in returning in this case. And yes, maybe I should, but I won't.
It's best when you have a "local guide", a friend who has lived there and does live there. I know here I could take you places and you'd think this is a S-hole, and other places and you'd think "This is much nicer than I expected." I suspect that is broadly true.