Which GPS

I purchased the newest Garmin RV GPS RV 760lmt and am fairly disappointed . They have done a very poor job of providing roads that are RV accessible causing one to drive many miles out of your way if you were to follow it. I often had to change to automobile mode just to get it to show where I really wanted to go. The RV services shown in it are a farce. I was about 5 miles from a Camping World and I put in RV services and it would not even show up. You could be parked in front of a place that sells propane or by a dump station and it wants to send you many miles away. I contacted Garmin with these problems and all they told me was to update it which I did to no avail. Garmin did not do enough research for information to sell this thing for $400. It isn't much better than a regular Garmin that I see selling for not much over $100 except that it has a 7 inch screen.
I used this unit in my RV for over 5000 miles this past winter travelling over a large area of the USA.