Helen is rude, aggressive, and totally insecure.
When you look at her history, it is not a great surprise, she has probably been 'shafted', excuse the pun, one too many times and has trust issues.
The insecurity towards Ashleigh and Chris may be partly their fault as well, but you cannot blame them for being appalled by her behaviour.
As for her 'redemption' 'change' - that's just a BB edit.
Much though I don't really like the sound of her much, I hope Helen does find some resolution in her life after this reality experience.