You have more patience than I do. I had a very similar experience as you did. Luckily I had packed my Garmin in the glovebox which I broke out during my trip and ended up using for the majority of the time. After my experience, I will now only use the Garmin which completely defeats the purpose for a built in nav. It does give you a nice large screen for the back up camera which is about the only benefit for the nav screen. Other than that it was a waste of money.
Sent from my Autoguide iPhone app
Sent from my Autoguide iPhone app