Show them this thread so they know to find another job, because you're obviously not going to treat this person well as a direct report. You're here saying the

Show them this thread so they know to find another job, because you're obviously not going to treat this person well as a direct report. You're here saying they're being negative, but you're not saying whether they're right or not, and if it's appropriate. They're going to have a bad time on your team unless you change your ways.