
Great explanation, you really well explained Genas acted like he did. Yet I respond to you because: Yes, he is not sole reason why they are estrange but he is part of the blame and it's understandable some people dislike him for it.
Genas made a lot of assumptions and treated Juliet like an object to save his brother disregard the whole purpose is that they need to fall in love for his brother to be save.
After all he did stop them from meeting/communicate, burn the letter and refuse to explain to Juliet.
Juliet should have tried, Enoch should have explained (and stop being suicidal) and Genas should have played cupidon instead of what he did.
Genas started the fire and couple added fuel on it

"After all he did stop them from meeting/communicate, burn the letter and refuse to explain to Juliet."
Enoch wasn't able to talk, Juliett just didn't know that when she told Genas that they needed to talk. He was bedridden with the fever because he wasn't married yet. He forced her to marry without meeting him for that reason, marriage immediately cured his fever and he went to go see her, only to be hit with the "this is how you do things?". The latest chapter shows that he then became suicidal and told Genas that he should've let him die instead of ruining her life.
What I need to go back and check is why she wasn't able to see her family for so long. I want to say the story sort of (?) implied that had to do with her withering away, but thinking about it that might be unrelated since she's cursed and dying. That's why he uses his crystal. I think Enoch was trying to get her contact with her family and only then managed to do it? I know he was avoiding her, since he thought his presence was hated and made her feel worse. Could be that she went without her family because she never asked him for them till then?

For meeting her family i think she just never asked as she refused to speak to Enoch. They barely saw each other after their first year of mariage I believe
But remember Enoch having and not being able to talk is because he didn't meet with Juliet. And it's not like Genas didn't know that but he acted with pride he forced the mariage instead of lowering his pride and making them meet since it would have fixed the fever.
Like Genas took control because Enoch was not in condition to but he didn't cooperate with Juliet who was in condition to
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.