Theres only a few ways zombpocolypse can end okay, and the Brooksian way is very rare. We're either going to end with the last two human survivors left on Earth walking off into a progressivly dim sunset, or everyones gonna die, but thats okay, cause the chopper that was gonna get them off 
the mall didn't have the fuel anyway. I've got a bit of the same problem, in that this episode really does kinda put the nail in humanity. We are watching an extinction. Thats how Zombpocolypses end, generally. We keep listening for the 
characters, to know why this is happening, but yes, humanity is done unless theres another mass wrinkle, and thats a long shot. This will not end well, and I'm not talking rainbows and sunshine, I'm taking about 
Michael not eating his gun after getting all the 
journals together in a library with no one left to read them.