South Park is one of my favorite shows of all time, although it has been slowly on the decline. 
Sorry to hear that.  It seems like a show focused on the same four boys who never grow any would start to falter.
It has been around for a long time, 1999 I want to say? I guess all things must end eventually.
That it does.  The theme song of the show could be All Things Must Pass, a song by George Harrison.