It just wouldn't be FFXIV without RNG. The game's motto should really be changed to "Progression is for the lucky." They can't even stop themselves in press conferences. They had to throw RNG into their PAX audiences.

Personally, I'm having a similar problem with Moggle Mog XII card. I have been running nothing but Thornmarch HM and Thornmarch EX since I got my Zodiac (though far, far fewer of the latter), because I thought, "Well, this will be nice. The Mahatma are easy to fill, and I can run whatever I'd like for them, so I can do my Zeta while I farm for cards." A week later, I've never had HM in bonus window, I've only made two "successful" (read: running once or twice) EX "farm" parties, the card has never dropped for me, yet I'm almost done with my 8th Mahatma.

MEX might be a higher drop rate, but every time I get a MEX party going, it takes 2+ hours for it to fill because everyone hates the fight, they only want to farm it for two runs, then everyone who gets their card (sometimes in both runs) drops after the second time because they're so sick of running Thornmarch from spamming HM that they want to be done with it forever. Meanwhile, I, who didn't get my card, am now faced with the option of grinding MHM for another unproductive week (or more) or wasting my entire available gameplay time trying to find more people who A) watch the enemy HP bars/can control their urge to kill every moogle they touch before all of them are weakened; B) actually want to do the fight; and C) will hopefully stick around for longer than it takes for them and them alone to get their card, because when one-two people leave the party, everyone else drops out like they're abandoning the Titanic.

I genuinely consider leaving this game over this card. It might sound like an overreaction to some, but when you only have so much time to play the game, spending all of it grinding your wheels and getting nowhere on content that is meaningful to you is extremely demoralizing. Yoshi, it's really time to take RNG off your friend list. It's a toxic relationship that's starting to affect people around you.