I've applied to jobs that required a long and tedious hiring process and in the end unfortunatley I didn't get hired, but I also had nice HR drones contacting me to provide a thorough review of my application.
Regardless of your decision process, if you don't give any feedback to those job seekers you turned down then you are the problem. The reason why candidates overanalyze stuff is because you left a wide gaping hole by providing no feedback.