So i ran around your map a bit.
First of all, the name of the file has "_backup" after the iteration string (a1), i don't know why, i guess you forgot to remove it or something.
Secondly, the map looks really... boring, there is only containers, EVERYWHERE, no variety, nothing. Secondly, it's at night time, and it's also boring, sunlight would be more desireable and could allow you to not use a lot of light entities by making roofs a toolskybox (like i did recently), you could also replace the dark grey dev floor with the white-esque grid dev texture.
There is a bit of z fighting on the cargos, not that bad, but still a thing, and the framing of doors are really large, make them take less space in the doorway, even if the wall is 16 units thick, make the frames thinner, it will create more space to move around.
But i was more or so shocked by this :

(Now note that the screenshot were taken with mat_fullbright on.)
Why is this a thing ? I won't go over it longer, but in the imp, expect unhappy gamers complaining.
Another thing is the lack of any pickups around the point, i know that pickups are supposed to be far from the point, but it's too extreme, i could find only one healthkit and i was suprised yet again :

The overlay is red, like ammo pickups, it's not good as if i play the map, and the pickup has been already used, i could think that red = ammo, and i would be waiting for ammo while heath spawns... point is, it is recommanded to use either white or blue patchs for healthkits.
Now i have a personnal problem, and it's that i consider a map good if we can access every routes without jumping, so you could say i was having a heart attack when i saw this :

Now there is 2 problems, : you have to jump and it looks...bad. Make it a ramp, or better, a displacement (google's your friend, 3kliksphilip made a usefull tutorial if interested).
Finally, there is a wall that is having an existential crysis :

It is on both sides.
And i think that's all i saw, please don't take my feedback negatively, i'm trying to help, even though i use rough words, it's not a personnal attack or anything. Have a nice day and get mapping.