You mean she was conditioned to be an obedient slave for the better part of two and a half centuries? Yeah. That does a number on the psychology of any human-ish sentient being. I'm not saying it's irreversible (though I do think it probably is), but it might take longer than the lifespan of the main character to really treat Lin's developed issues.
If you want an interesting window into a similar situation, there is a book floating around containing interviews with former slaves after the US liberated them during their civil war. They... did not appreciate freedom, to put it mildly.