Not to be mean, but this is exactly the type of map that you need to just scrap and use for the experience. It would take more work to try to fix it up than to build a new map from scratch and do it right.
You have giant boxes made out of the barrel texture, ladders made out of a block of grass growing on the side of jail bars, and in general, I don't think a single texture is aligned correctly (did you use the grid at all?).
I take that back, in the 5th screenshot, there are 2 correctly aligned barrels.
Anyway, here's what you need to do:
a) Start over.
b) Pick a consistent theme to work with. From the name, it sounds like you're aiming for some kind of crate warehouse type thing, so you'd want to be using crate textures (perhaps look at Hobo's stack map for inspiration on what you can do with these textures). Try to come up with a layout that doesn't have too many bottlenecks and allows for people to work around campers/liners. Try to make a design that's more than a big box with smaller boxes inside of it.
c) Use a grid size that fits the textures. In the case of crates, it would be 64. For things like that metal wall texture, it would be 32 (personally I think some kind of brick or cement texture would be a bit more fitting, though -- try to use real life locations as inspiration).
d) Learn how to lock and align textures.
e) Add some nice details where appropriate -- things that fit in with the theme.
Don't worry, everybody's first map generally turns out pretty poorly. It takes time to learn the tools and gain advanced understanding of how to build a good map. Just keep at it.
