
yet another woman betraying her for that douche? I mean, her cousin, her maid, and now the lady she encouraged to expand beyond the social norms and take control of her life? I don't get it. Her Ex is a creep of epic proportions.

Wait, what are you talking about? I'm pretty positive the Person A(the Blue-haired girl, cousin of the red-haired guy,) and Person B ('new fiance') are two different people. Way two different people...
And personally I don't think person b is a bad person. It looks like she had no other choice (she looked hesitant and scared while being introduced).

He just got home to men attacking the one place that's supposed to be safe. He's probably never been both livid and terrified at the same time. He's so overprotective of Maxi that having to reign in the rage he must obviously be feeling is going to come off as anger with her when that's not really the case at all.
The original FL is obviously a conniving manipulative biotch. That ends all pretense of her being the sweet gentle influence on him to become a better person. She already changed the main storyline. Take control of your life girl!