Based on my observations of the online pep/glp communities on reddit, Facebook, telegram/Discord/Discourse/Pepchat, and traditional forums like this, I feel like "my pep feels less effective" is the most useless metric out there. It's the same with all the "TCI feels cleaner/pure/stronger" BS. Just purely subjective nonsense. How many posts on reddit are there along the lines of "my new vial doesn't feel like it's working?"
I think there are MANY legitimate reasons to drag QSC through the mud over, but taking the current case of the empty vials and trying to lump QSC in because an end user isn't feeling their expected results from what are (in my opinion) pretty finicky medications is just not fair.