I have had Garmins, for years. All of them, seem to take head scratching routes at times. Short route, fastest route does not matter. I think Garmin may get kick backs, to route you near business and stop lights. I update the maps, every few months.
I did a road trip, to Delaware from NC a few weeks ago. I bought Bowler’s Cetus MV. The Nuvi kept wanting to route me into stop and go city traffic. It seems to ignore bypasses and beltways. Trips to Florida, DC or any where, always seem to route through a business district. My Smart phone and Google maps, are always different , than Garmin. But, I rather keep the phone as a back up plan, not a primary GPS.
I also pull a camper, on occasion. I prefer not to pull it into heavy traffic. Looking for a GPS, to keep me on the main road. I may try a trucker or RV unit. But have never used one.