Sounds more like documented cases of shooters that can't group with any pistol. We have m&p9c and i am very happy with group size after a trigger kit from apex. I also don't have the eyes I once had but can still shot this pistol very well.
Improve the junk trigger and groups size tends to shrink in size with a better trigger. No brass in face issues but ammo maybe some of the problem. Our throws brass up and back left. My kanrs throw it over the wall at the indoor range pelleting shooters next to me. hehe
I do tend to like the longer trigger pull in the compact model over the short rest in some full sized pistols.