Since a gun requires ammunition to do what it was designed to do. If it fails to fire, when I wanted it to, it counts in my book.
Course thats likely why have yet to run across that magical "no malfunctions ever" Glock.
When you listen to enough gun companies who offer armorer training, you start to hear some commonalities when it comes to trouble-shooting & correction techniques. Also, there are only so many things for which the gun companies and their engineers can hope to exert any control over once any particular gun leaves their factory.
For example, no matter the QC of the materials, design and manufacturing, once that gun goes out the factory door the gun companies have NO control over any of the following:
*User familiarization with properly using their gun
*User maintenance practices
*Ammunition selected and used
*Environmental conditions in which its used
The Ammunition part of that list may be a bit beyond the immediate control of the User, because while the User is primarily responsible to being familiar with the safe/skilled use of the gun; the way the gun is cleaned/maintained; and the conditions in which the gun may be used ... the User has to rely upon the Ammunition maker to make a good quality product to reasonably high quality standards. (Yes, it's still up to the User to correctly identify and choose the right caliber ammunition, which can sometimes become an "issue".
)
It's just that a gun company can only exert control over what they're doing while they have their hands on the product. Once it goes "out into the wild", they can't have any direct control over some pretty critical influences and potential issues.
Listening to gun company techs and engineers, and a significant number of LE firearms trainers (and even commercial/private trainers), day in and say out, upwards of 95% of all "gun problems" can usually be diagnosed and attributed to something the User/Shooter did (or didn't do, but ought to have done). The remaining "5%" is usually broken down to mostly turn out to be ammunition-related, with the smaller percentage being an actual "gun problem".
For something to be a "failure", it really needs to be diagnosed and determined whether the "failure" is on the part of the User (familiarity, manipulation, or maintenance), the Ammunition, or the actual "Gun". If the "gun", and we're talking about a pistol,
then we may need to further separate the "problem" down to whether it's the gun, itself, or the magazine(s) being used.
After all, you can't blame the motor veh for a "failure" of the rubber tires.
Sometimes a broad generality is ... too general.