Hmmm not sure about Lucinda getting less flak! She was voted off very early, and had loads of memes/mocking about the way she spoke. On Unseen Bits and After Sun. She got a LOT more abuse than Kaz, on her intelligence, playing off men, grammar lessons from Georgia. And actually she didn't disrespect any of the boys - she swerved Aaron's kiss initially and then ended things with Danny to carry on with Aaron. So the abuse was just about her personality.
Faye has had SO MUCH ABUSE. On here and all over media. Her lipstick, her dress sense, brittleness, how badly she treated Teddy, and now she's getting savaged on Twitter too.
I think the unconscious bias goes the other way - that because Kaz is a woman of colour, there's an assumption she's getting it worse. But if you run Twitter stats you'll see both Lucinda and Faye have had equal if not more abuse. And actually Kaz is still voted in.