Yup, many issues, UI is not great (most of the shortcuts are not there), stingy gem amounts, one month event that can be cleared in 5mins, doing daily quest gives gems that are 1/10 for single pull...
Cleared story (mostly skpping text after chapter 4). End game is coop play that is hindered to slowest game speed, stupid way to introduce Gear (you need to coop hard dungeon before it is shown).
They have 7% rate for 5*, earlier account I made multi which had 2x4* and 8x3*. With the account I now had pulled 15 single pulls, result was freebie 4* dupe and rest were 3*.
To the next gacha game, didnt feel bad to delete this