Seems like this dude has made himself in his mind the one and only last-word in the entire project, which is fine, but then if you're going to vanish for months

Seems like this dude has made himself in his mind the one and only last-word in the entire project, which is fine, but then if you're going to vanish for months at a time, you need to have someone else available to watch over things. He doesn't seem to be willing to cede ANY control to someone, but also needs to take several months off the project at a time. Neither of these are inherently bad but you can't have it both ways.