There does seem to be a pattern in Star Trek that no matter how shitty your life is, if you've been living there for a while "This is our home. This is our way of life."
I don't think Alixus needed to die at the end rather than face a very long prison sentence. But the colonists definitely should have been a lot more angry and at least half of them should have left.
The entire episode might have worked better if Alixus was portrayed more like a cult leader. If she had targeted weak willed people, desperate for authority, instead of taking just a bunch of normal people. That way it would have been much more believable for everybody to want to stay behind.