>>536313460
ZZZ player here.
Yes, it's the story. After 1.4 the story went to shit and it hasn't recovered yet. 2.1's story was moderately good but then they doubled down with the horrid summer event, and the slopfest after that.
Outside of that, the gameplay is very unique but VERY REPETITIVE. You've played it once, you've played it forever. The only change in gameplay came in 2.0 with the addition of a new path (Rupture), but they released only 1 character of said type in launch, made her a limited 5* character, and she's the only rupture agent we've had for the past 3 months and will be the only one we have for the next 1.5 months.
But the main thing is that it just doesn't pander to the common denominator as much as Genshin or HSR. Genshin panders to casual audiences, HSR panders to people who don't like to play videogames, leaving ZZZ to pander to the people who are too much of a coomer to fit in Genshin, too much of a gamer to play autoslop, and with too much self-respect to play another one of the generic coomerslop gachas. Which, as you can imagine, is a pretty niche audience.