What makes the fight "hard" for groups to learn is that it's the first one that requires the players to both know how to play their jobs effectively and understand the battle mechanics. Some players and groups are "learning" fights by banging their heads against a wall, doing the same thing over and over again, closing their eyes and wishing good luck. When they wipe they start from the beginning without ever asking what went wrong and how they should fix it. Many are just following some guides they have read or watched, seen they have to stand in certain corner during the divebombs without having a clue how the divebombs actually work, for example. That kind of a player or group may get there, eventually, but they haven't really learned the fight and may have issues repeating it, especiallly with different setup or strategy.

To everyone still struggling with this fight, do yourselves a favour: every time you wipe, make sure you (and everyone else in the group) knows why that happened and what you can do prevent from that from happening again.