I don't particularly like Chanelle but do agree that Carol is behaving badly towards her. She seems to have singled her out to vent all her frustrations with everyone in the house on. If I'd been in that house with Chanelle tantruming about the violin, I'd have been annoyed too, but I would have rowed with her at the time about being so childish and then I would have moved on, I wouldn't decide I was never going to talk to her again! I also think Carols unfair when she criticises her for her on/off relationship with Ziggy, I'd say the fact it is on/off is more down to ziggy than chanelle.
I have a theory that Carol's always been a massive Northern line fan and was so distressed when they ended that it turned her mad, now she's deeply inlove with Ziggy, Cathy Bates in Misery style, and wants to tie him to a bed and break his ankles until he has written more Northern Line hits and so she hates Chanelle for being with him