Don't trust anyone who says "I like Helaena" and then voluntarily blind to the fact that she is a victim of marital rape
The way some people turn it into "b-b-b but Rapegon didn't want to marry her! He's a victim toooooooo! 🥹" makes me puke. It's sick.
First of all, when Rapegon doesn't want to do something, he doesn't do it. He didn't want to study or behave himself, or stop raping women and he doesn't. The very idea that the *only* duty he does is the duty to rape his sister, and he refused to do every other "duty", should make brain work and draw the right conclusion: he despised her, but she suited him for sex.
He doesn't suffer from it at all, he's having "harmless fun" with her. This is not "doomed brother and sister" dynamic, this is abuse and Helaina is victim of her husband.
Secondly, it's obvious that he rapes her long after the wedding and after having two heirs, in fact she's pregnant with Maelor in season 3.
No amount of mental gymnastics will justify what he's doing. Not like he's the only man who rapes his wife, but he's definitely the only one who has a fanbase with the idea of making him a victim in a situation where he's absolutely not.