Garmin GPS

I have the Garmin RV760LMT with up to date maps. All I have to do is turn it on and it will get me lost. I never really trust it now. I use a trucker's atlas to plan my route and use the GPS to look ahead for diesel, food, etc. My phone has a better map program. The last time I was on I40 going through Oklahoma City it kept telling me I had to exit as there was a low clearance ahead (I'm under 12 feet high). I noticed the 18 wheelers were not exiting so I decided to take a chance but the Garmin kept telling me to exit. It even got to a point where it had a screen pop up that made me hit a button to confirm that I was ignoring the Garmin directions. Made it all the way to New Mexico and never saw a low bridge. It has done similar mis-directions many times but this was the craziest. I still use it when on the interstates to look for services at upcoming exits. My guess is if you program it to go to Alaska you'll probably find yourself heading south into Florida as it takes you around the world to Alaska. When I want to get lost I program the Garmin to head to Dallas, Texas so I can find all the dirt roads on the way. I never trust it any more but use the trucker's atlas and it has never been wrong. The Garmin was wrong many, many times. Can you tell I really don’t trust the Garmin?