We already have some questions which answer how to turn down an exit interview (you don't) and how to say nothing at an exit interview I got a multiple choice to fill out - different topics to rate from 1(very bad) to 4(very good).
While it's obvious that I shouldn't select 1 at all it becomes very hard to generalize that much without hurting anyone.
How was the relation to your bosses?
Now I'm in trouble because I had the best boss ever - and I wouldn't hesitate to mention this. But I totally didn't liked my Boss'es Boss. Giving a good mark would mess up honesty and improvement for the company, also it would annoy me. Giving a bad grade would damage the relation to the company and the boss I liked.
I'm extremely concerned about the exit interview anyway; Not to vent will be hard and from what I know from HR and with this sheet it's going to be nearly impossible. Not because I didn't liked my job. Because I loved it but after a change in the organisational structure the fun vanished, my health reduced and work time increased and all projects took disastrous paths. (we are 3 people in our division, we all got extremely frustrated. My boss will be retiring within ~3 years, my other colleague can't find a new job because of his health condition that requires special gear. They couldn't hold their promises of reducing my work time, they couldn't offer home office. After my doc tried to convince me quitting completely I could agree with my doc to just reduce my work time, he got me a note. The company ignored this (against the law), I was fine with that. But my bosses boss started to rant behind my back that I'm just lazy and try to have a cushy number. At that moment I started looking for a new job)
Mentioning (again) that I quit because of health is not only unnecessary (I mentioned it before I resigned and before I even looked for a new job), still somehow I have the urge to at least let them know that I think it's a no go to ignore your employees health requests, ignore laws and ranting behind their backs.