Help with employee / board tensions
I've been the President of a not-for-profit co-operative board. We employ 2 directors. One director is very good at their job overall, passionate and hard-working, but their personality is extremely volatile and demanding and it's been wearing on the board. This person does not respect the time of the volunteer board members. They refuse to answer simple requests for information, instead responding with questions like "Why do you want to know that?", making us work for the information we need. They will complain to us for an hour about other members of the organization but refuse to issue a written complaint so that action can be taken. They continually bring long-resolved incidents from the past into the conversation in an effort to condemn the other employee. They have made unwarranted demands regarding their wage and we've been criticized and yelled at when they didn't get what they want. They refuse to accept accountability for any of their own failures and instead find ways to pin those on board decisions. Of course this person is sweet as pie to the general membership who the board represents, so we look like the bad guys.
We recently held a members meeting and things came to a head between this employee and a frustrated board member. Things got loud and the board member got a bit out of line. I failed in my duties to shut down the interaction as quickly as I should have. Apologies have been issued, the board member who was at fault has apologized, and I have offered my resignation, recognizing that I did not handle the situation well and thereby allowed the employee to experience undue stress.
So, now I am leaving the board and they still have to deal with this employee and all the things leading up to this unfortunate event. I am wondering if it would be completely out of line if I wrote a letter to the employee detailing all the frustrations they have caused. They've been told in person several times by various board members, but I think it's time for it to constitute a warning of sorts. I want to put this letter in their personal file.
What would you do?