I agree with sticking to facts about an incident rather than pointing out personality flaws.

As his boss, can you not fire him for gross negligence? Or for creating a hostile work environment?

If you feel like leaving is the easiest and best option for your health, then do that! But if you can remove him from the company, would that be easier on you in the big picture?

Even if you do find another great job, you may have confilcts there, and will have to deal with confrontational situations at almost any work place in my experience. Especially in a managerial role.

Good luck! I hope you find a solution that makes you happy!

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