I've already released my first/worst levels. Go and look in Releases - Mods if you want to find them.
Personally, I think Weather Station, my first map, was my worst one. The level doesn't have a good theme, and some parts make no sense in that it doesn't fit the theme.
But on the bright side, it's not that cramped or open... well, I think the beginning might have been cramped, but I don't remember if it was or not.