I don't mean to be condescending but... you seriously have no idea what you're talking about if you think current ATMA is bad. Nowadays, you can finish your 12 ATMA grind in just a couple hours. You'd be lucky to get A SINGLE DROP within 4 - 6 hours of grinding when it was new. Drop rates were so low that people thought the quest was broken. We used to have theories as to what made some ATMAs drop faster, such as... Rain makes it more likely to get an ATMA in La Noscea. Non of that was ever true, but we were just coping with how bad it actually was.

Don't get me wrong, after making a few Zetas when they were current and after farming 1080 FATEs for all ShB relics, I also hate FATE grinding, but the truth is that current ATMA is one of the most mild proper grinds the game has to offer these days.