[orbz]

This will all depend on your working relationship with your VP but I don’t think there’s anything wrong with citing burnout as a reason. It’s hard to argue against that, you’ll hopefully not burn your bridges so have the option to come back one day and lastly you’re giving them constructive feedback. Burnout is not due to the individual, but is instead the environment they work in.

Don’t ever feel like this is a you problem, it’s not.

[supriyo-biswas]

This may backfire if the VP suddenly gets, let's just say, "emotional" about the entire matter and then tried to be vindictive by providing a poor employment reference.

[throwawaysalome]

In these litigious times, companies can only confirm an ex-employee's hire and departure dates, not comment on his performance or if he was fired.