1. I skipped Zhongli's banner since I don't really understand his kit but later I realize I need him. I pulled for Ganyu instead but didn't regret it even after I got Ayaka and used her more.
2. Pulling on weapon banner since I got no 5* weapon and got the Unforged, while I had no good shielders at all. I did main Diluc so that's a saving grace. Though when I saw the next banners has Memory of Dust and Lost Prayers I felt it's only going to get worse. I don't think I would use PJWS either.
3. While I was still new, I scrapped many 5* artifacts with sets I didn't understand without even looking at the main and substat, it's especially a big L since I dumped a lot of resin on the Ocean Clam and Husk Domain and scrapped all of my Husk artifacts since I don't know who's it good for. I never built any Geo chars.
4. Not having Diona.
5. Probably not having enough primos for Kazuha rerun so might have to bust my wallet once more.
It's kinda sad that all 5 of them has to do with Jenshin Impact.