After some soul-searching, and a brief refresher of my resume, I began the onerous task of looking for a new job. It's become apparent that continuing exposure to the UnManager is hazardous to my health. After just over a week, I've already had 3 interviews. Two more firms have called to say that they would love to hire me based on my experience alone, but don't have any positions available.
No offers as of yet, though. One thing I have learned from this experience is not to jump at the first offer. While nearly anything else would be an improvement over working with UM, there is something to be said for the devil you know.