Get mad that they supported a completely incompetent corrupt "centrist" sex pest to be the mayor of a city he hates. Get extra mad that they (New York Democrats) are so incompetent that they couldn't find one of "their guys" who had slightly less baggage.
It is good he lost, but you can also get mad that they are so incompetent that they put their whole asses out there to push the guy who didn’t even win!