The job market has worsened my self esteem and absolutely destroyed my self confidence

The title speaks for itself, months of redoing my resume, re writing cover letters, reaching out to hiring managers and trying to network with people with no results has led to a complete decline in mental health and absolutely destroyed my well being. i am a mid level professional and also tried boosting my resume with skills i only know the names of, but still no luck. What happened , where did i go wrong ?