Way to big for a ctf. Too easy to cap because of the high number of obstacles that you have to get through to chase the flagger.
Visuals not that bad, but too much randomness. When you make a map, plan it in your head, or even better, on a piece of paper.
Think about the gameplay, the routes and the flow of the map. Also stick to the theme of the map, meaning dont put tanks, helicopters
and a black hole in a "jungle" full of trees and vines.
You are getting better with every map you make, not much, but you are atleast making progress.
The next map you make, make sure its playable and more horizontal. Also i suggest you make your maps symetrical, they will be more balanced.