Step 1: Put all your Games in a Folder, SEAL it for about 10 years.
Step 2: Wait ten years.
Step 3: Unseal the Folder, play your Games, be ashamed!
I must say, i am bad at mapping too, but at least i make something that can be called a Map. I don't know what you are making there, but surely not Maps...
But well, i see how you can make 300 Maps in one day while most of us make one Map in three Days.