Festivus is a glorious holiday because it is so honest and real. It is a fictional holiday, but haven't we made it real? And aren't all holidays fictional because all history is not fully true? And holidays are usually based on historical events. So Festivus is as real as any other holiday.
My favorite part of Festivus is the "airing of the grievances." There are quite a few this year, but I am going to be general:
1) Our institutions at the local level failed us;
2) Our presidential election failed us, and may have led to the end of our republic;
3) There are more racist bigots out there than I thought; and
4) Human beings are largely a reprehensible lot.
All of this being said, there are still many good people in the world. The deplorable ones just stand out more than they used to.