“But why when you go to get a blessing from a Rabbi or Talmid Chacham for help finding your zivug, he tells you that you already passed her up, you thought she wasn’t pretty or had a big nose or whatever.”
I thought that was one particular story, with an OLD bachur… passed up his zivug cuz she had a big nose.
I don’t think this is the usual bracha one gets from a Rebba for a shidduch… I would think it would be more along the lines of ‘hatzlacha rabbah!’ or ‘b’shaa tova!’