Why hot?

Why does a psycho gotta be the best looking character here? Also, sorry, but so far he’s a lot smarter than her. I just can’t understand how did she expect to inherit the crown while making 0 connections, enemies actually even, not following any of her duties or responsibilities and actually openly acting like an immature villainess? Like this isn’t a transmigration story, she actually did all that. Not to mention she knew he was a complete psycho and still didn’t try to take any measures against it. What did she expect would happen? He didn’t even steal the crown from her, even without faul play he probably would’ve gotten it. I just don’t get it, was she that stupid or is it just bad writing? I can’t really get past that part. He’s awful and dangerous, but she basically handed him that win.