So I'm on a team where nearly everyone is at each other's throats, and the manager who used to be an engineer can't bring himself to stop doing technical work and taking over people's projects, basically doing them himself, because he has severe control issues.
This is devolving into an extremely toxic mess very quickly. 60% of the team is ready to quit within the first year of hire, some of them within weeks and months, one has quit, and another got fired for losing his cool over the situation.
Would it be unethical to privately warn the incoming hire before they accept the offer?