Remember when TF2 builds were good?
Sorry, a vast amount of them were never actually any good.
At first it was okay, but then it turned into what is apparently a really good build.
By my standards, it's not very good, taking a good look at it I can point out many major flaws.
Large use of print crates- sorry these just suck, try building your own crates, trust me it looks a lot better. (Don't add too many crates though)
Little or too much cover- once again, there are these crates in random areas making huge choke points on almost every corner, there should always be at least one choke point, not like four.
Extremely boxed shape surroundings- you took a couple of 64x64 cubes, made a u-shape and filled it with buildings, making it less loose, less free movement, and in general ditch the horrible u-shaped idea.
Another little personal thing, the bosses are stupid and are poorly thought of, but don't take that too harshly I just take things more serious.
Lastly, you don't have to do any of this stuff but I really suggest it, the stuff I pointed out can really change your "tf2 server" as I've built many tdm's and I have some experience.