VP of Eng here. If we take your statements at face value, your manager isn’t doing his job. Toxic employees are death to companies and it’s management’s job to get rid of them. (After attempting to address the issue. But my experience is that toxics are gonna toxic. Don’t coddle them.)
If you’re willing to lightly scorch some bridges, talk to your skip-level manager. If that doesn’t work, or you don’t want to, your best option is to go work for a decent manager, either at the same company or another one. Life’s too short, and you’re not going to be able to fix the toxic employee.
In other words, get someone who can help, or get out. Take your friends with you.
If you’re willing to lightly scorch some bridges, talk to your skip-level manager. If that doesn’t work, or you don’t want to, your best option is to go work for a decent manager, either at the same company or another one. Life’s too short, and you’re not going to be able to fix the toxic employee.
In other words, get someone who can help, or get out. Take your friends with you.