Hello, During your exit interview I would tell them how you feel. If you already have another job they can't do anything to you. It's best that you inform them of where they made mistakes and caused you to want to leave. They should be understanding at this point whatever you say should be to benefit their company with current and future employees. I hopes this helps. Sincerely, Katrina

As satisfying as the gif of Angela Bassett walking away from the burning car is, this is not actually what you want to do. An exit interview isn't the place to vent and burn bridges. So take the notes above that suggest making a single, overarching point in a tactful way but leave it at that, say what was positive about the job, and move on with your life. Save the venting for your friends.

Yes, definitely make a point on your way out to point out how this hire has changed your team in a tactful way. It will make you feel better and will hopefully help things for your colleagues in the future; other people in the company may not be aware! Have you talked to the other members of your team about this?

Since you're leaving, you can be honest. You can also be vague & you don't have to express your exact emotions (or exact examples) if it makes you feel too uncomfortable. You can say things like: "The team chemistry has changed under the new team lead, and it doesn't really feel like teamwork anymore." Or you can say: "Now that we have a new team lead, my experience doesn't seem as valued in the department, so I'm taking a new job where my industry expertise and input are more appreciated." Things like that... where it's true but it's not something that might be perceived the wrong way. You simply don't like it anymore & the team dynamic doesn't work for you anymore & you don't want to stay. It doesn't have to be super awkward. But you can also wrap it up with something about how it was a job you enjoyed and you'd be happy to work for the company again in the future (so as not to burn any bridges).