All exit interviews are the same.

   It's not you, it's me.  I got a better offer elsewhere.  No, I won't discuss it.
   
   Here's my email if I can help you with anything after I leave.
   
   Thanks and good luck.

I see zero areas where detailing the things you didn't like lead to a better outcome for you than keeping your mouth shut. After all, if they didn't like ops running around like a scalded cat, they'd fix it. Leave this job off your resume.