An alternative is to create actual criterion using expert opinion and academic rigor.
When someone, smarter than I am, comes up with an objective and measurable criterion using expert and academic rigor, let me know. Until then, I support using the only objective metric we have.
I find the continued fight to explain why 5e is both bad and overwhelmingly popular to be mind numbing. The premise that 90% of the community plays a bad game is ripe with issues. But people keep trying excuses, such as 5e players being ignorant of other systems. All in an attempt to explain why it remains to so popular while being so bad.
The newest thing is that popularity means nothing. 5e is popular due to voodoo witchcraft, because it's an awful system. Let's dismiss this popularity, tainted by evil magics, and come up with a new metric - one that shows how bad this system really is.
This all feels like an round-about way to tell 5e players that they are wrong for liking the system. A ham-fisted attempt to "teach those 5e noobs" how a "good" system plays. After all, there is no chance that they actually like a bad system like 5e. It can't be that 5e is actually good. We know it's bad, why can't 5e players see this.
People are free to like, and dislike, what they wish, but this continued disdain towards 5e has led to a mind-numbing barrage of reality twisting theories. All of which wish to explain why a good game is bad, and why that game's popularity means nothing.
It's tiring.