I have a cover letter that I customise with great care for each application and it seems that its only use is to demonstrate that not a single recruiter ever re

I have a cover letter that I customise with great care for each application and it seems that its only use is to demonstrate that not a single recruiter ever reads it. Not even a little bit. Note that most of them do not even read the résumé either, since they often obviously go through it for the first time while they call you on the phone.