Tbh most recruiters (from startups to large software companies) I engaged with so far have been attentive and respectful, sometimes even very nice on a personal

Tbh most recruiters (from startups to large software companies) I engaged with so far have been attentive and respectful, sometimes even very nice on a personal level. I find it quite hard to judge them professionaly as I do not know what they know. So what do you dislike about recruiters?