The random rule is not okay

[Zorafin]

I kept hearing about horrible drop rates on difficult card battles in this expansion, so I put off doing it until this weekend. And in that time, I got most of the cards available. So reading through this thread, I just figured people were being whiny. Yeah the fights weren't easy, and the grind was frustrating and unnecessarily long. But they were always like that. And they weren't too horrible compared to the ARR cards.
Then I got to Matoya.

I've been doing matches against Midnight Dew for an entire day. She has incredibly strong cards, requiring you to draw strong cards too. But of course, you can't pick your best cards. So I'm winning maybe a quarter of my matches, maybe less, and the match is decided the instant the game starts. And my luck is all used up. I've won a hundred matches against her, with no card drop. Because of her I have the Vaan card (and so occasionally have to look at his dumb face occasionally as I play Midnight).

And then there's her win quote. She's telling me that I need more card to beat her. In the mean time, I have all her cards, except for the one that I can only get by beating her. So she's insulting me by saying something that applies more to her than to me!

I don't get why I've spent as much time trying to get a fairly garbage card as I spent getting all my best cards in my deck combined.