Turns out the UX of the website had been user tested extensively. The design they chose was the most successful at achieving their goal (new user signup or something).
The learning lesson was you may not be the target user for the design. Or you may not realize what the primary goal of the design is.
Edit: This was the article I referenced https://medium.theuxblog.com/there-are-no-ux-best-practices-...
To clarify I wasn't trying to defend dark / grey UX patterns. Just thought I'd share as it helped me look at (what I consider) bad UX in a different frame of mind.