I won't say that this is necessarily bad, it's on par with some other webtoons you might find, but if you read the synopsis and go "oh boy, a manwha about a guy building a dungeon named Dungeon Architect, that's what I'm looking for right now", yeah you're gonna be sorely disappointed.
I read up to chapter 50 and considering the author seems to be setting up a big adventure for the main crew to go on, I really doubt he's gonna be settling down and architecting a dungeon at all anytime soon. The one actual dungeon he built in those 50 chaps was one he just kind of finds + takes over and he hardly adds anything of his own before leaving it.