then what is next after easing up on Atma drop rates? Then everyone will be whining that 1500 myth per book are too much and SE should lower that too?

I've been through the Atma grind, having a full time job and so on. I whined endlessly to my friend who finished her second Atma set in like a week while I was still at 4/12 on my first set. Yes, it is a shitty grind but once you get it, you have (after all upgrades) the best weapon in game. The best weapon should not be something that can be obtained in a week.

If you don't want to do the grind, go and buy the weapons you can get from tokens. 1300 tokens plus an UAT is ridiculously easy to obtain nowadays and the weapons are pretty nice.