I'm not at all sold on this as a duel map, but it's for sure a solid pub DM map. Clean geometry, nice lighting, and for the most part good item/spawn placement.

I have only 2 pieces of critical feedback and they're both extremely minor:
1. I'm not quite sure why there's an ammo pack stacked on top of each rocket launcher - mistake maybe? None of the other weapons appear to follow that convention. Either way it looks very strange. Moving the ammo pack out next to the rocket instead of on top would be much better.
2. The map is missing an invisible ceiling, which allows players to head jump out of the holes in the roof. Very minor of course, but adding one in a b2 would be a good fix.

Nice work! This is a really fun pub map that I'm sure will be solid at GN as well.