Holy grail quests is a new one for me, but I great way to describe my last VP.

They loved a good "give vague goal or directive, ignore all communication or progress reporting for months even when directly contacted, put off approving any spend until the literal last day before the goal will absolutely fail and then completly flip your shit because you don't understand or like the solution you didn't have an opinion on up until it was about to live, who then yolo some crazy last minute change that invariably shit all over months of work and spent 5-10x as much to get your ideal solution that would have been great months ago if you would have told us you had a preference and that 10x spend was on the table instead of assuming no responsibility in any way before wasting fuck tons of other peoples time just to cause needless panic that was 99% about optics and not actually successfully completing the task."

Yeah, you're phrasing is better.