I don't know what they'll say when I die. I don't give a damn, but they'll probably cry.
You must never aspire to 'finish' a house, you can merely hope to start it, and from then on it's an evolutionary process.
A simple rule in dealing with those who are hard to get along with is to remember that this person is striving to assert his superiority; and you must deal with him from that point of view.