Maybe Stupidity is an unfair title for that section. In reality this list shows thatKellhus was far the the master of his own circumstance. It shows, among other things, that the story he tells others (and the reader) isn't the full scope of reality. He might have been ignorant of his own plight, or we might have had the true story hidden from us, but either way, much is happening behind the scenes that we don't know about.
If he was forced out, then we have had no indication of this in the text. I don't claim to know what happened, and him being coerced or forced to leave unprepared is certainly an option.