Well, I think this one has potential. I just hope the author won't use push and pull troupe too much because it will be tiring to read this.
The boy's attitude is understandable. Will you be able to hang in there for four years of verbal abuse from your love one that you cherish the most? But, on the other hand, Yrwin was not stable at all. She lost her everything so of course she will be a well, bitch.
Let's just say that they are both deeply hurt.
Now, the OG FL, Stella was it? I feel like she played a big role from poisoning the ML in the story. Her or maybe other people used Yrwin and ML's situation so she can be with him. I can't say it's the Emperor's younger brother is the main suspect because as we can see, he's obsessed with Yrwin. If there's a scenario where Stella and the Emp younger brother made a deal, I doubt that he will let Stella kill OG Yrwin.
I have a bit hope for this story.