Quality Issues?

I have photographed many doors and have had them accepted into Adobe stock. The primary problem here is perspective. Stand further away so that you can get a straighter perspective, not leaning. Shoot wider and use the transform tool in Photoshop ir Lightroom Classic to get ensure that the vertical elements are vertical. 

It's a nice series, and I would encourage you to continue. But yeah, as @Abambo said, maybe too tightly cropped (and skewed/distorted). Even then, I'm not sure what commercial values these might have outside of an occasional need.

Your assets are very narrowly cropped, and they need to get a perspective correction. At a first sight, I would say that most of the pictures have an exposure problem.