Your sense of scale is dangerously off. I don't really know what to say other than that usual drop heights are between 192 hu and 256, and you're making everyone on BLU drop yay high off a building to fight
there's also no light_env as evidenced by these pics, for some reason it only showed once I turned on sv_cheats. Regardless lighting is a
MUST on basically any map, even enclosed ones.
I know it's alpha but please consider putting some textures besides pure white, also there's little to no height variation inbetween areas of the map.
Not to sound like an asshole but I feel you need to re-study map fundamentals, UEAKCrash's series on YouTube is one of my favorites and I still frequent it to remember certain things. I say re-study because it's clear you have an understanding of basic game logic (which is something I admit I still struggle with) but not as much for scale and actual gameplay design
And yea, it's always expected to take some pictures of your submission even in alpha stages as Snickerpuffs mentioned
View: https://www.youtube.com/watch?v=7cZhJF4P2vI