A few years ago I started reading short stories (slush pile reading) for a magazine and it was a very interesting experience.
I am naturally a long-form writer so I understand that a really well crafted and satisfying short story is not an easy creature to produce, but as a reader I was struck by how difficult it could be judging a story’s merits.
Some stories were very well written but just lacked dramatic tension, or resolution, or a point. Others were written so simply that they felt underdone even though the characters and ideas were solid. It was almost a relief to get one that just stank (and I hate to say it, but some really did!) because they were easy to judge.
And I always felt bad for the authors whose stories probably would have gotten published if the story had been through a critiquing process from a writing group. A little tightening up was all some of them needed to really shine.