@Felthry The crash on the all-white splash seems to be attributed mainly to Easy Anti Cheat. Apparently this is the strange way to disable it, if you don't mind playing offline:
https://steamlists.com/elden-ring-fix-for-most-performance-and-crashing/
The game has frame dips for me when it's loading in chunks on my modern gaming PC, hopefully this will all get sorted soon.
-Zu
@squirrellilly thank you for the advice though, even if it didn't work
-F