In my previous Android phone I managed to disable Google though I was unable to utilise the screen real estate the vanished search bar left.
In this updated version I tried that out of the box and bricked it, forcing a factory reset. So I've settled with denying Google access to the microphone so Alexa is not listening to everything. I scrupulously refrain from touching the search bar and use the Startpage shortcut instead.
My phone sends no telemetry etc data to Google. I have disabled Chrome. Location services is only on when it needs to be.