First of all,being "Developer" for a lot of games,are just like kids always says.(No offense)
Second,making a main structure depends on what you're going to make.Not always took 2-3hours or more.Since some people can be efficient on work.
Three,People complaining(As jealousy) just for getting event map,and the animatronics(Withered) and Mangle still uncomplete.
Dlive and ProClassGamer just testing the map,so Keithy didn't work twice.He didnt have much time to record,so,he choose Dlive and proclass to record it.Possibly Entoan.
And even a simplest game,a pixelated game,like Misao,horror game,it can took 5days or more.Because,where will you get the scene,frame by frame,character naming,game naming.Its not that easy.If you are developing a game,you'll probably overextending it just for 1 game.

:)

Gmod is tough but if you want a perfect game or map, you have to take time. But whenever I go to the map's page, ALL I SEE IT COMPLAINING AND PEOPLE WHINING