asianmusicguy Bro here is the full step to roll back to the old Google Dialer.
1. Open Google Play Store.
2. Search for Google Dialer (Phone by Google).
3. Open the app page → tap Uninstall to remove the latest update.
4. Once it rolls back to the factory version, tap the three dots (⋮) in the top-right corner.
5. Disable Auto-update for this app, so it doesn’t update again.
If not then you can use dialers like “N-Dial” or “Voidcaller” which have complete asthetic of nothing os.