There's too many applicants for that. You're getting canned responses because a human probably never even saw your resume. The other issue is that there is a small amount of people are _extremely_ unstable. Giving them any kind of feedback encourages them to harrass the company and employees. It's like 1% of applicants, but when you're dealing with this many people it means you are guaranteed to run into someone like this, so it's often policy not to give specific feedback.