I downloaded this map to test it, here is some feedback.
Firstly, the disk shelf props you put underground are over the floor by a bit.
Secondly, Why is the small room in the corner even there, if it had ammo and/or health it would be useful, otherwise, i don't see why its there.
Third, There is a weird pass time visualizer where the "sewer" is, when you walk through it with the briefcase, it teleports back to the base it came from. But worse, After it teleported back, i couldn't pick it up. plz fix.
Fourth, There is a pixel walk near the middle of the map by the side, that should be easy to patch up.
But the thing that made this map not really that enjoyable (at this state) to me was the outside, not the layout, but the texture. This dirt texture for me would show up as an error texture, i saw the pictures, but mine is like this, i realized its a displacement also, so maybe thats why? i don't know, just make sure you look into it and that it gets fixed.