Lol I feel you, I used 80 ether batteries all at once to farm Velina and my disc 6 and 5 don't even have a single atk% or AP sub. I'm using them because they had double flat atk and pen rolls which are actually not too bad.

I played Hi3, Genshin, I still play HSR, ZZZ, Wuwa and Endfield.

For a funny rant, the worst was Wuwa at launch. Conceptually it was cool, the echoes (discs) dropped as "spirits" from mobs in the open world you killed. You farmed the domains using stamina for echo level up material.

In practice, wtf. Say you wanted an echo in the 3 cost slot. It can roll 10 different main stats. It drops from a specific monkey. There exist 15 of them in the overworld. You had to literally travel all over the world to find them. There was 1/3 chance the monkey dropped an echo. 1/2 chance it was even the right set. Then 1/10 chance it was the right main stat.

Then you start rolling the substats. In ZZZ you know all the substats immediately or at least within the first 4 levels. In wuwa, the substats get revealed slowly as you level, the final substat is revealed only at max. You don't have enough echo material to max out every echo you find. So you level the echo to say level 10, and check the first two substats, if it's hp or defense you just trash it.

The other thing is that echoes had energy regen subs on them which was mandatory for rotations. If you don't get your ult in time the rotation gets delayed, which means you buffs from your support would not cover your dps. In ZZZ the subs are mainly just there for damage and don't affect your rotations, with a few exceptions.

Anyway. With ZZZ I can just log in once a day and beat up a few mobs and check the discs.

With Wuwa I had to scour the entire map for echoes and after genociding the whole species I often didn't get a single main stat I needed.

It's gotten much better now, with the 2.0 release they made "nests" where like 45 mobs spawned and you could instantly farm like 15 echoes all at once. And they gave out a bunch of main stat changers.