If you are using Intel Open Image Denoiser (i assume you are) then there are ways to feed normal maps, material IDs, albedo maps, etc to get clear lines. It looks like you are not applying that - atleast my edges are very blurry.
See wall/floor intersection the room in the center/bottom of the image.
Is it possible to turn off the denoising of the viewpoort in raytraced?
(EDIT: I found out its the star-symbol in lower left corner).