You probably already know this, but that’s unfortunately the nature of gacha.
Last year, there would be times when I would get literally everything in 60 quartz. There were even times I did a ticket pull and got MHXA, Sherlock, and Artoria Lancer on the first try. It felt amazing, but I knew one day I would be coming back to planet Earth. Several months later, I’d have to drop 500+ quartz just to get 1 copy of maid alter. Then several months after that, I dropped some major money to get a Shuten. I can’t say I’m out of this rut yet because my gacha pulls have been horrible the past couple of months (even my GSSR on New Years was cursed LOL). It definitely stings, but you’ll get over it eventually. Just keep playing and saving, and your luck my turnaround in a future banner. Sometimes taking a break from the game helps, too. In the mean time, I’m leveling up some of my bronze and silver servants and it’s been fun using the servants you typically don’t have in your rotation. But I certainly understand the sentiment of saving and spending only to be disappointed.