There could be more work put into it, but it represents alright for now.
You might as well use the terrain rock instead of CSG Rocks, as it can be easily more flexible and easy to use. A few hills, props around the map as well as some cover for zombies can surely improve the empty spaces on the map.
It's an OK attempt, but you'll get better once you get the hang of it.
Either take criticism or do not post anything. I displayed the criticism to help show you what is off on your suggestion, not outrightly dethrone you from the competition like a #######.
Look, I was on the same road as you were - which took me nowhere but make people dislike me for my behavior. You have the talent man and prove to have it, and I am real keen to see what you can think of next to present to everyone here - but if you are just gonna close down a thread blaming someone for being 'negative' for a constructive criticism AS WELL as going onto MY wall to tell me 'what I did' on your offense does not light you in the right, but as a pompously adamant person.
Just saying from experience, but right now, you're not making yourself look any better on others with this behavior. I do hope you consider, but I am not fighting with some person on the internet.