Our worst was when Nova at Oil Nut had just opened. They were doing tapas style and not only were the portions non-existent it was crazy expensive and just not good. I felt so terrible for the waitresses that had to answer for the food. We saw ones of the girls the next day and she told us she quit. Luckily, ONB realized it was crap and redid their entire approach.
Saba last trip was a close second.

On the other hand, if anyone knows Laverne from Leverick they know you don't get better than her!