I am not a hiring manager but I have some thoughts that may or may not be useful.
After a few rounds of applying to jobs, people start to simply shotgun out resumes and filter the job opportunity later. I doubt there's any conscious malice involved. This is a tough time for some people and those applicants probably stopped being selective after early failures. Others who are looking for lateral moves may just be testing the waters. What's the delay between collection of applications and first contact?
> Not a single applicant has ever replied thereafter. Some have replied to schedule a first meeting and simply didn’t show up.
Not sure how to parse this. It sounds like some of them are replying.
> is this the new normal in recruitment? Is it a collective revenge against companies that ghost candidates?
I think what you are describing is the old normal. The shoe is simply on the other foot. "It's just business" has become almost a mantra for technocrats.