Don’t Argue With Them
You will want to argue. There will be days when you feel like you’re biting your tongue until it starts to bleed, but it’s important not to start a verbal disagreement because you won’t win. Even if you’re right and you have other people backing you, the narcissist always needs to win – at least in their mind.
The only step you’ll take when you argue with them is possibly losing your job (which might not be bad) or putting a target on your back. They will spend their workday making your day miserable for as long as they want or until they find another person to pick on.