Had the same problem.. Was doing allot of research trying to fix this problem.. Looks like RTX series have allot of issues with this game. Tried all the tips on deleting cache and Dirextx12 files. Nothing worked, keeped crashing after couple of minutes.
Sooo after a lot of googling, i found this review (https://www.igorslab.de/en/need-for-speed-unbound-in-the-test-without-rubber-band-ki-freezes-the-comic-hell-to/)
at the end of the review he had a tip about also deleting the DirectX 12 files but most importantly he also mentioned to delete the profile settings files.. And this fixed it !!!!
So all steps i took. (delete all files in folders)
C:\Users\YOUR COMPUTER NAME\OneDrive\Documents\Need For Speed(TM) Unbound\cache
C:\Users\YOUR COMPUTER NAME\OneDrive\Documents\Need For Speed(TM) Unbound\settings
C:\Program Files\EA Games\Need for Speed Unbound\shadercache
Really hope it works for more people who have paid and can't play!
Cheers!