I had breakfast the other day with a former colleague who’s now managing his own team. He asked me. “What do you do when you really don’t like one of your employees?” When asked why, he simply stated, “He treats people horribly and brings down the whole office.” I simply said, “You need to fire him”.
If you can go through your whole career and never come across this kind of toxic personality, more power to you. But the reality is that most of us have either had a toxic boss or co-worker at some point in our working life.