90 rolls in a gacha game with no other incentive and no guarantee of outcome is absolute garbage. I'd spend more on this game if it were like PSO2's system where you get things based on number pulled, with occasional (albeit rare) guarantees thrown in there where you can control what you get.
Let's also not fucking kid ourselves -- 90 rolls to get a guaranteed 5 star, then making multiple 5 star items a possibility is a further slap in the face. Their upcoming banner that will feature female characters with Jean, Keqing, Qiqi is going to be laughable. So many people are going to roll for one of those specifically and the 1 in 90 is going to result in 66% of the time they won't get what they want. You're looking at 240 rolls on average, to get the 5 star you want. That's about $500.
No fucking thanks.
If anyone thinks this game is a good deal, go look at that guy that compared the $20,000 account to the $15 account. The $20,000 account was just barely better, the only clear advantage was having all the C4-C6 5 stars, which is fucking worthless when you can't even level them all up. That account did, only because he also burned a fuckload of primos on replenishing resin every day getting exp books.
This is probably the worst value gacha game in existence, including on mobile, by a longshot. Every game feature is designed to get you to spend money, even basic leveling up of your characters. You are given almost nothing free outside of the one-time things, and they throw a fuckload of them in your face to hook you in, and then once that's dried up they give you nothing. Their events are garbage tier, needing no time at all to complete, but lasting too long, and all are uninteresting. That last one on the traveler was fucking dumb.
The crucible was the best event they have ever done and even that is over in 2-3 hours and you don't have to touch it again. Nothing is grindable in this game without spending money. The value in this game is just.. its just so fucking bad compared to every other gacha game I've ever touched, it's not even close.
And that's a damn shame, because the game itself is so good.