Your nights must be damn long if that only took you one.. It looks like at least a week-long project for me.
The layout looks pretty solid.. Except the underground seems a bit basic. It might be because of the lighting.
I'd move the YA away from the quad. In one second I can get them both, and either way both are very easy to reach.
And noclip the trimming on the ground.
Snipers will probably enjoy this map and pop out like whackamoles. But this map is still rather short in height so they'd be easy to hit. I think playing this would be pretty fun.
Oh, and my other concern is that it is VERY easy to snipe one flag from the other. While I don't expect a flag to be completely concealed, this degree of exposure is a bit too much. Is it possible to raise the middle building a bit? That would also make the quad harder to reach.
4/5