I left this year and wasted an hour of my life doing the exit interview.
I watched what the HR underling was writing and it bore absolutely no resemblance to what I was saying - when I challenged him I was told it was being translated into 'management speak' to make it more readable - what he was actually doing was removing anything even vaguely negative about the company and particularly the managers.
When I asked what they did with the reports I was told they were collated and presented to management on a quarterly basis. Obviously so they can ignore them all at once!!
Still have absolutely no regrets over leaving...