Do I just suck at finishing touches, oooor.... Is it random or what?

 

Every single time I make something it's better than the shop quality, but I've never gotten points for a very good result. Does the final stitching need to be absolutely flawless or what?

 

If they expect you to get 20 of them it can't be too hard....

To get Very Good Result in Tailoring or Smithing, you need to use a scroll that is 2 Rank or higher than your current rank.
Eg: If you are at F, you need D or higher. If you are at 9, you need 7 or higher.