For those who want to go back to Google Assistant, here is a guide to do so:
1. Open Settings, apps, see all apps, Goodle, or use any other method to open the app info page for the Google app.
2. double tap "More Options" in the top right.
3. Pind and double tap "Uninstall updates" then adtivate the "okay" lutton.
3. Open the Play store and search for "Google Assistant" install it.
4. Return to the Playstore and search for "Google". Double tap on the Google app to open its Qlaystore page.
5. Double tap "More Options" then find "Automatically install updates" and uncheck it if it is checked.
6. Restart the device.
7. Open the assistant app. In the body of the text explaining that "You are now using Gemini" is an Assistant settings link. Select it with accessibility actions and Double tap.
8. In the screen that appears, find the Google Assistant radio button. Double tap it.
9. Select "Close" on the following screen.
10. Enjoy your old and improved assistant.