AVPC is now available as ONE download :
https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=464054293

Yeah, I know it did for me too when I tried to downloaded it. Just hang in there and try different things like I said in the A Very Postal Christmas description in the how to install part found here: https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=353429024

This is the biggest and hardest to download that I know of in the workshops right now. Just hang in there persevere and try different things like login and log back out of steam and try unsubscribing to some parts and then doing them later. That's what I had to do amongst other things. Patience is key

when i subscribe it says saving then the game chrashes and so does steam