You do a great job telling how nearly every aspect of living in this new world is filthy or how things are decayed yet still slightly useable for these people. The Prologue however has so much in it I would qualify it as bonus content or something along those lines, perhaps have half the info be found as revelations to the characters along the journey.
I read a few pages after the prologue and you have become more refined in your work quickly so your already progressing at a good pace. There is a movie not exactly similar to yours as in it is insanely dark, Its called "The Road" a 2009 film. But it was a book first written by Cormac McCarthy. I hope you continue your work. 