At every opportunity to burn a bridge, don't do it. That bridge might be rickety and you'd never cross again but it is a possible path in the future or maybe a

At every opportunity to burn a bridge, don't do it. That bridge might be rickety and you'd never cross again but it is a possible path in the future or maybe a recommendation that brings in some other bridge to cross. Exit interviews just gracefully decline or say the good things that happened at work, I am sure over time there was some gained experience. If you truly don't like the place and they did things that will lead them to their ultimate ends, just let them. You are leaving, you are free, it isn't your problem, you tried to help when you were there. Nothing amazing will happen with words if you couldn't change it with actions in possibly years of work.