There's nothing really special about the map. It looks just like any number of similar maps; it has no character. The reason for this blandness is simple: you've just made a box, filled in with more basic boxy architecture, and filled those rooms with prefabs.

The high r_speeds (average of about 1300, topping 4000 in the corners) are wasted on this map. Not only are they excessive, but even with all these polygons the map still looks dull. It's not good-looking by the standards of HL1, let alone HL2.

There are, however, a few interesting ideas; I noticed that you've included a "pillbox".

If you want to make a better map, pay attention to the following:

• VISblocking - you should design the map so that the game engine can't see too much at once. There are too many little windows in your map, with the result that the engine is drawing almost all of it at once.
• Creativity - make something novel and personal; don't recycle tired ideas and don't disinterr long-dead prefabs.
• Architecture - make it look interesting.
• Textures - try something other than the stock concrete HL ones.
• Lighting - bright, washed out white is not atmospheric. Try to use atmospheric lighting to create a mood, without actually making the map dark.