Given the last scene we see of Sharon in this episode, I'm not sure how much of her anger is necessarily truth and how much is a cover. Assuming she doesn't turn out to be a villain in this series (either working with Karli or Power Broker. Unless she turns out to BE the Power Broker, but that would feel awfully small world in addition to being character assassination of the highest order), it sure looks like she's undercover in Madripoor to me. Which means she may be play acting a fair bit, using her justifiable feelings of resentment to mask whatever work she's actually doing.
It makes total sense to use her actions in Civil War and her fallout with the government as a cover, if she was brought back in. It's a story that anybody would believe, if they did some digging.
It was great to see her again, I hope she shows up again before this is all said and done.