
I see people seem to hate Genas, which I don't really get. People act like because he started them off on the wrong foot that he's the reason they're estranged and it's like... That's not how that works. They had years to talk, she had years for her anger to subside, he had years to tell her why Genas did what he did, she had years to try and find answers, etc.
Genas said it to her, remember that he was fully confident and assured her that Enoch would treat her well and when she said she'd never forgive him he said that he's sure she will eventually forgive him. The issue is that she played brick wall the entire time, wasting away both emotionally and physically, Enoch refused to talk about what matters and only tried to make her feel better without explaining anything and Genas is an outsider to their marriage so of course he's not just randomly showing up and trying to mediate... Driet also never explained that this all started with the sacrifice of Enoch's mother's heart, which is pretty relevant to whether or not she hates him. As we know, knowing all the facts she feels stupid and desperately wants to turn back time.
Genas assumed she'd be angry for a bit and get over it and that Enoch would have told her about everything eventually. It's just an arranged marriage, they're royalty... That's what the necklace scene is about. He realizes that Enoch didn't tell her what happened or she wouldn't be wearing those in front of him. The point isn't "you're wearing those in front of me", it's that "he didn't tell you". Which means Enoch did what he does and self sabotaged. He didn't think he deserved her and regretted hurting her by removing her from her family, so he let her hate him. He planned to use his own crystal to heal her.