Unless you are employed where your job description calls for carry and possible use of a firearm, I'd say that failures today with modern firearms are largely due to:
1) operator confusion/panic/lack of training/infrequent practice
2) ammunition
3) firearm
I have been researching about 5 or 6 handguns for the last 6 months
and it seems that nobody makes a gun that you can just buy and
depend on.
No matter who makes it: Colt, S&W, Ruger, Taurus, Glock, Rossi
Kel-Tec, Kahr and so on, all have at least some complaints.
Along side these complaints are many who have had no problems at
all.
It gets very confusing.
Jimmy