Why your protagonist stays stuck at the start
Your protagonist stays stuck because The Lie has actually paid them, and their excuse for staying is a trade a fair listener would half accept.
How to describe your protagonist in a few words
Two to four words should be enough to say who your protagonist is, and a label that fits anyone makes the story's demands on them vague.
If you can describe your protagonist in three or four words that would fit anyone, your story will feel generic too.
Cynical Pittsburgh weatherman. That's Phil Connors in Groundhog Day, and in three words you already know his flaw, his worldview and roughly what has to break.
A good label names one or two things about your protagonist outright and hints at the rest. It carries their strength and flaw at once, and suggests what they're reaching for even if they can't name it.
Dreamy Kansas farmgirl. The Wizard of Oz puts Dorothy's dream right in the label.
The label matters because so much of your story has to fit it. The event that starts your story has to land on this particular person. Someone else would react differently to the same trigger.
The gap between who your protagonist is and what your story will demand of them should be visible inside the label. If the label fits anyone, that gap goes vague.
You can't predict how anyone takes bad news until you know who they were the day before it came.
So write your protagonist in two to four words. Check that the words hold their strength and their flaw at once. If they could describe anyone, sharpen them until they couldn't.