At first i thought of it as the first season ending. But as the months rolled on, i started thinking of other possibilities.
I think that it ended because it wasn't going anywhere. There was a main plot, but it was ignored to a point where every episode was like its own show, not a linear progression with a few pit stops here and there.
I will admit, i am pretty bummed. I personally loved the show and actually fully related to the character Stork, who tends to think on the negative side of life.