There are about 5 million registered voters in NYC, and yet Comrade de Blasio won about 670k of the 1.1 million votes counted. That means de Blasio won about 62% of the 21% of eligible voters casting ballots. That's hardly a mandate.
Hard as it may seem, there are many good people of virtue and morals living and working in NYC. There is lots of good stuff in NYC as well. My heart goes out to you, but as usually happens after an election, NYC won't crater. Godspeed.
The exact same thing happened in the first election, which is how we ended up with this piece of garbage in the first place. Only 23% of eligible voters bothered to vote in that election.