No positive character has ever been this hated. Her behavior doesn't seem positive at all. The reason why she is hated despite apparently being a positive character is that she says one thing, but her actions are the complete opposite of what she says. She says she won't come between her ex and his wife, yet does stupid things that make her look opportunistic, such as finding ways to garner sympathy and attention from her ex, whilst also touching and hugging him closely right in front of his wife and family, then acts remorseful by saying she knows she is troubling everybody and being a burden on them. Is it that hard for her to avoid making physical contact with her now married ex when she is upset? If she was crying that would be understandable, but the way she openly grabs him, touches him and hugs him right in the presence of his family and wife make it look like she's doing it intentionally to get their bloody boiling.
If I was in juhi's place, no matter how upset I was, I would still be conscious of myself enough and my environment to not go touching and grabbing a committed man irregardless of whether there is anybody there to see it or not. Why? Because I have shame.