This map is kinda weird. The overall flow and shape of the map makes it difficult to both defend and attack because players get spread across all the numerous inter-connecting routes that seem to lack purpose.
Another thing is that when I enter an area, it should be pretty obvious what I'm looking at. "Oh, that's the sniper balcony", "That's the sentry spot", "That is where I should be going", but none of the areas have that level of readability and none of the areas are places I want to be in.
For example, take the following:
I don't know what I'm meant to be focusing on here. There's so much stuff that distracts me from what is going on. The ledges get in the way, there is a weird sightline on the door in the centre, and the height elevation on the right is a massive blocker that breaks up the area too much.
From a reverse angle it's the same problem:
The pillars and ledges make me not want to move forward because they block me from moving easily and create strange, thin sightline blockers that ruin my view of the area. Again, the massive block in the middle gets in the way too much and makes the area feel really cramped.
The crate and railing on the left ruin the flow especially when there's a bunch of players around the cart. Same for the building on the right; it's too close to the cart track.
The numerous doorways here make the area feel unfocused. It looks and feels messy.
I don't know what I'm meant to do when defending last. There are no sentry spots and there's no cover. It's also really easy for blue to spawn camp if they have a demo/soldier on the pipe and other team members at the other exit. There should be at least three exits that are relatively far apart to discourage spawn camping.
That's all I have for now. The map needs a lot of refinement before it can start to become enjoyable.