Bandish Bandits S02 Question

Hi all, just watched S02 of Bandish Bandits. I think it was a good approach overall. Although I think the soundtrack was a bit disappointing considering its first season! My question is: Tamanna mentioned a couple of times that she wanna move on from her past relationship which was TOXIC. Now, I just wanna understand that what was TOXIC in her past relationship with Radhe?