I think you should work on your maps, not just create new ones all the time. I don't see almost any progress in your abilities. You improve much faster when you finish few maps and then go and create a new one.
For map itself, if you tried to create realistic looking terrain, you didnät do too good job, it looks really blocky. Here's a tutorial from cusoman, how to create realistic looking terrain with clipping planes:
http://www.youtube.com/watch?v=2QgOb4fdmE4Or, if you want to use vertex manipulation in BSP, you must do this:
In the newest release, one rather important feature was left disabled in the included Bsp.cfg. The setting "vertex_select_mode" should be set to option "2" instead the default of "0" so vertex dragging can be enabled.
For more, you have unreal looking structures, like those platforms made of rock. And the walls have cracks, which are annoying. Fix your brushes or put a clip brush