>>/72323/
Yeh. My gacha luck in ZZZ and especially WuWa has been weird, as I have still not once won the first 50/50 in either of them, but then I'll roll the banner character in the 10 roll after losing it, or roll 2 of them in one 10 roll when I finally get them. 
As someone who has played some other Cygames games, the spark is worse. It takes way more to save for, and you end up skipping a lot of banners you may have otherwise rolled on because you gotta make sure you have a spark for when that limited character you really want drops.
Whereas with Hoyo games system, it can be painful at times, but I at least feel like I can roll whenever a character I want comes out.