You don't need to subscribe to your own map, after compiling your map, when you're ingame, go to zombies>solo>zm_yourmapname

The map doesn't even show up there for some reason and I have no idea why.

It'll show up as your title you named it when added to workshop, not the mods name itself.

That doesn't show up either, it's just not there.

Whenever I subscribe to my own map on the workshop and go in game, my map doesn't appear. Does anyone know how to fix this?

Can you open a autosave backup? The problem you should be having is that in your .gsc/.csc file you have a #using or something like this that you don't have in the usermap.gsc.
Hope it helps. 

It works perfectly fine now, thank you so much! All I lost was widows wine which will take me 5 minutes to get back lol.

After copying and pasting the zm_usermap.gsc to my map folder so I could get rid of dog rounds, but now I am having quite a few issues.

First off, I tried to compile my map, but when it started linking I got an error:

Linking "zm_mapname" (usermaps\zm_mapname stable 2535893 v593): 
processing...

********************************************************************************
UNRECOVERABLE ERROR:
  Map with no brush models (should at least have the world model)

Linker will now terminate.
********************************************************************************

==================================================
Linker summary:

There were no errors or warnings.

==================================================

Then I tried opening up my map in radiant and I got this error:

(!s_mapIsLoading)

D:\Steam\steamapps\common\Call of Duty Black Ops III\bin\radiant_modtools.exe
..\..\src\effectscore\fx_glue_material.cpp:264

Anyone have any idea of how to fix this? I already tried verifying the cache but that didn't work.

This map is terrible. Hijacked rounds were poorly thought out as late in the game, not only is the gun given very weak, but as soon as you run out of ammo for it, you switch back to one of your other two guns, and the one you didn't switch to disappears. So say I have a type 95 and a raygun mark 2, and surprise! Hijacked round happens. I run out of ammo with whatever the fuck weapon it gives you, and My character pulls out his type 95. The raygun disappears and you are simply fucked. To add to this all, it takes a dumb amount of points to get the power on, building power is not fun, and the black and white filter is boring to look at. It seems like a very rushed map where the only thing going for it is that its a ported MP map from BO2. It was plain frustrating to play and was very poorly designed. I give it a 2/10.

I am assuming you didn't get hijacked aid (because you ran out of ammo) which allows you to pap for 2500 points during a hijacked round which shouldn't matter late in the game considering you should have lots of points, and gives you an ammo refill every 20 seconds. I know for a fact you lose a gun after going down on a hijacked round but losing a gun when running out of ammo I have not heard of, it could be a possibility though. Are you sure you didn't just go down? By the way hijacked rounds shouldn't be much of a surprise since they come every 5 rounds. It is perfectly okay to not like this map but I assure you it was not rushed. It took FinalKill9175 and I 2 months of constantly scripting testing and thinking of ideas for the map all day. However I am happy you criticized us with what you didn't like about the map (the black and white power)  . 

btw he moved one of the parts i told him he should before he uploaded it to add a sense of discovery and he will not be showing where the parts are ONCE A MODERATOR EDITS THE POST PLZ!!! (To get rid of the parts picture).