It took me about 20 hours to get all of my Atma. From my experience and a few others I've talked with, I believe the drop rate is around 2.5-3.5%. This seems pretty reasonable to me. People don't like the RNG element of this but a lot of things in MMOs are RNG. I played with a DRG who'd cleared T1 50 times before getting a certain armor piece. This isn't a big change to MMOs in general or FFXIV in particular.

People don't like that they aren't making clear progress towards a goal. This is true of any PUG (there's a chance to wipe and not clear). This is true of many loot drops (there's a chance Ifrit HM drops unneeded weapons a hundred times, or a thousand, or a million) but the odds are vanishingly small. Yes if you do x number of Fates, you are not magically "due" but the odds of NOT getting an Atma after 180 Fates are only 1%, so I'm thinking that people who have farmed for 30 hours with no Atma are in the very small minority.

Your feelings matter, your frustration is understandable. However, I'd suggest not making Fate farming the primary focus of your in-game activities and more look at them as just something to do while you're waiting on a dungeon queue. I've heard of DPS having 30 min dungeon waits. Maybe use that time productively and Farm some Fates, or work on your 20/100 enemy kills for the companion part of your challenge log (it's good companion exp), or chat with FC members, or connect with other players. To many, (myself included), the Atma complaints seem largely based on: "I want it and I want it now." This alienates other players and makes your voice go unheard.

My personal beliefs are that these type of games should offer different types of progression to appeal to different players: challenging gameplay or time consuming gameplay. The Atma quest is entirely optional and provides something for players that would have trouble (or simply don't want to) challenge hard content for an equivalent weapon. Both types of rewards satisfy players in different ways. For me, each Atma drop was tremendously exciting. True, it's in part because it signified progress towards ending something that felt tedious, but I actually feel that removing the grind would also remove the satisfaction of seeing that Atma message pop up.

Imagine if a similar nerf was proposed for the other style of content: Titan EX was hogtied, he was face down on the ground with his hands tied behind his back. You didn't have to tank swap, you didn't have to dodge, all you had to do was show up and rotate combos until he died, it would feel hollow to get anything from that because you wouldn't have overcome a hurdle that required effort.

And to those who say Atma grinding doesn't require effort, I disagree. You need patience. Some people have it. Some people don't.