Hello, i downloaded you'r Map, and here's some feedback:
1. As Uncuepa already mentioned, you'r Map is Fullbright, add Lights.
2. The Model of the Door at spawn clips through the Wall.
3. The Resupply Locker doesn't open when you get near it.
4. The Pick-Up Items don't have "patches" beneath them, add Patches to tell Players that Items are there while they're Recharging.
5. The Door isn't attached to the Model
6. Big Sightlines, little Cover
7. This Wall in the Spawn's Courtyard seems unneccesary, it only delays the arrival for the players