I never could find a way to remove my moms house from my nest account
either. Nest is not really-as far as I can tell- migrated to Google
home. I changed the name on it so it wouldn’t bug me.
Try to clear the learning schedule. Mine decided to start heating the
house to 90 at 2am. My wife had gotten cold and cranked it up once or
twice and the thermostat learned it.