Overall, the map looks pretty solid both aesthetically and gameplay-wise. I like how there are good positions for both teams to hold whether they are attacking or defending throughout the whole map. However I do have a few critiques.
This might just be me personally but I'd prefer if the bomb was placed in a bit more open spot to allow for flexibility for people to arm/disarm. Disarming/arming a bomb already puts you in a vulnerable position and forcing players to have their back to their enemies when doing so doesn't seem like a good idea to me.

Here's an example of how you could move the bomb so you can get a better idea of what I'm suggesting.
This is a smaller critique, but this opening near the bases seems kind of small to me. I think it would be nice if it were expanded a bit, just for the convenience of the players trying to drop their dogs/crate.
Aesthetically, I think it would also be nice if you added a bit more detail to the map. Like Anak said, I feel like there is a lot of gray and incorporating some new blocks and colors into the build could help make it better. I think a good way to do this would be to add team-colored details to the towers around the map and in the bases. Would help reduce potential confusion while also make the map more visually interesting
Other than that, this map is looking solid, nice work. :)