I have had many poor experiences with recruiters. You have heard all the same stories I have to tell.
The ones you may not have heard is the odd post on LinkedIn from a recruiter which suggests that the role is so cutthroat that you have to ghost most candidates.
The one person I know from college who became a tech recruiter was someone who was not technical (English/philosophy double major) who loved telling people how stupid and wrong they were about things. He bemoaned once to me candidates that applied for job x which required experience x and not y which the candidate had, and how dumb they were for thinking it was equivalent. (They were mostly equivalent, which I knew having had a year of both under my belt; he never asked what I was doing at work in that conversation)
You can draw your own conclusions. I have met recruiters I felt were under enormous pressure to find the best candidates. I have met some who were the scum of the earth. Mostly, unless they were on the payroll of the company they were hiring for, I have just felt they were lazy.