There seems to be a conflation of toxic and productive which I don't think is necessarily true. In my case the most toxic coworker I ever had was one who was no

There seems to be a conflation of toxic and productive which I don't think is necessarily true. In my case the most toxic coworker I ever had was one who was notoriously unproductive but managed to kiss upwards and kick downwards in ways that made it take a while before management noticed.