Not snarking, but you either have a needlessly arbitrary bar, or you've left the applicant pool up to people unqualified to gather applicants (non technical young HR, etc)
That said, it's certainly true there's lots of spam in job applications.
During the actual job I've never once had issues of any kind, but my brain just shuts down in interview environments. I'll forget the simplest of things that I do literally daily, and it all just ends up spiraling out of control from there. It's like there's 2 people in my brain, the regular, competent me, and then interview me who's a bumbling buffoon that I myself wouldn't hire. It's not even a pressure thing, I do fine in high stress environments, it's just specifically during interviews where things go wrong.
The real number for them is probably the next few parts of the hiring pipeline after those resumes are scanned and filtered.
It seems like systems level programmers are either firmly employed somewhere else or have switch roles to an easier domain. I know I've considered going back to Python programming where I can make the same money with a lot less work.
Something is terribly wrong with your hiring practices. You just need to admit it's a "you" problem.