Should I be Salty?

No reason you can’t be salty. However, thats just what happens sometimes. There are times when one roll will get you a 5 star and sometimes you can spend 300 sq and get no 5 stars. It happens to all of us.

I rolled 400 SQ trying to get Artoria and got nothing. Rolled 30 on Gilgamesh banner and got him. Gacha is an infuriatingly fickle thing. Your salt is justified.

Well... I tried to get Shuten-Douji. And I got her... after I spent way more than I wanted to. (also I didn't really get any worthy 4* in the progress)
I didn't count how many hundred SQ it were...

Today, after collecting a few SQ I tried to get Shiki (Saber) not really hoping for anything. You know... Just doing what I still can, so that I won't have any regrets afterwards (sounds pretty stupid, I guess).
Anyway, I got Shiki (Saber) after "only" 60 SQ.

So yeah... I'm pretty happy with that... But it's all about luck.