Last year, I agreed to do Task X (imagine, say, editing a newsletter for alums) for the department until I go to Asia in the spring; I agreed on condition that I wouldn't do Task X when I got back. I did Task X a couple of years ago, and the results were well received.
It is a truth universally acknowledged in my department that I'm less wonderful than most at doing X (imagine editing). This truth is fairly painful at times, but there it is.
So, today I got asked if I would do Task X again next year, to give the (Leslie) person responsible for overseeing Task X another year to find another Xer. And Leslie is one who makes no bones about letting me know that I'm inadequate. But, apparently, the (painful to me) irony of asking me to do Task X when Leslie him/herself is obviously much more capable is lost on Leslie him/herself.
Apparently, only one other person in the department is willing to do Task X, and when s/he does it, despite his/her obvious skills at X, Task X doesn't turn out well.
I want to suggest that Leslie put out a general request for someone to take over Task X, but I realize that the one other person would jump at the opportunity, and the results would be as ugly as before. Despite my weakness at Xing, the results seem largely positive when I do Task X.
Pluses and minuses:
Task X is, in itself, not onerous or unpleasant, but it's not my favorite either.
But, Task X means I don't have time for Task Y, and Task Y is far more important to me. But, Leslie doesn't care about Task Y; it's someone else's responsibility.
And, I resent Leslie for asking me to do Task X yet again when s/he knows I feel that Task Y is more important and central to my work.
I resent Leslie asking me when s/he's made it clear she thinks I'm less than competent (but still more capable of actually getting Task X done).
At the same time, I know that Leslie respects my abilities to get Task X done successfully despite his/her sense of my incompetence at X.
I don't think Leslie would go out of his/her way to do me favors or disfavors with his/her connections either way. On the other hand, I may be wrong about that.
Task X is important in the large picture, and needs to be done by someone. So either someone new steps up, the unsuccessful person does it (to the detriment of all), or I do it again.
I don't know what to do.
Because of my lousiness at X, I really don't feel like there's anyone in my department with whom I can talk this over and get good/wise advice.