My Question
When I gave my two weeks' notice, I gave my manager secondary, much smaller reasons, for resigning. I didn't want to bring up the Lead in order to avoid an awkward final two weeks. However, I think it's unfair to both myself and my manager/company to leave letting them think it was for such trivial reasons. I quite liked my manager and team.
I am considering sending an email on my final day/hour explaining the primary cause for my departure, with explicit examples of things he's done.
Should I do this, or should I leave with things as they are and avoid the risk of damage to myself? I'm afraid my manager would think badly of me for not bringing this up earlier and sending it in a negative "farewell note."
Background
I joined the company less than a year ago, and have finally resigned after putting up with my Team Lead and his constant veiled hostility. I can stand politics, but not to the extremes of where it starts to affect things like my physical health or I'm shut out of work to do.
He gave me virtually no feedback as to what I've done to deserve this treatment, and I honestly feel like he did all this to drive me out (into resigning). I'd have liked to stay at the company longer by switching teams, but "politics" like this is apparently rife throughout the local branch.