Truck on dirt road, side street when Haupstrasse .. klaaar !?

So I have the TomTom Pro 5150 Truck Live now for almost 2 years in the truck (tanker, dangerous goods). I am sadly disappointed in terms of routing and the GPS signal.

Why do I have with EVERYONE! new address entry 3-4 times times "Finish" to confirm if the Navi to calculate the route to getting started?
Most irritating to note that you must continue to pay attention to traffic signs and blah ... This must be the one entering confirm with any new address! Is not that enough when turning once as do other Navis also? As a truck driver, I really need something not Neviges! Especially since it only costs time and is idiotic.

The next one is the partly very poor GPS positioning. I have it tested in four different trucks, always the same problem. If the weather is bad, you drive through urban canyons. not even little streets, but normal streets or intercity cups with trees at the side of the road. But sometimes just like that in the bright sunshine.
The Navi loses the GPS signal, added one on a parallel street, 100 meters away from the "real" road is, map rotates to traffic lights suddenly in a circle / back and forth, etc.

Now the route guidance:
What is this supposed to be? A truck Navi! ???
Just a few examples: When I drive by our place is a straight main street that leads from the site. Simple right? Not for the Navi. I will take the second left purely then paralell to the main road through the alley to chug along 800 meters ahead down again to drive to the main road. What shoud that !?
The route is not shorter, more quickly, so totally illogical. And something happen very often!

If me the Navi example will guide with a detour of 10 km to a place and I do know that I otherwise save time and KM, me will ever umlotsen the Navi. Until I'm almost at the destination. And since it is the TOMTOM also whether the dirt roads / are forest roads, which are already difficult for cars to get through. No matter a 18-40Tonner cometh druch, the tears just like a tank just ne new path in the woods!
So really, something lächrliches makes not even my car Navi. So who is leaving because the Navi can ever save the night tow into the phone.

Another super Route Fail. I drive to the customer via road from Ort1 to Ort2 8KM. about 1km before the turnoff to Ort2 me wants the Navi send to the highway to get to there. Detour additionally 7km! Of course I'm going not to the highway. Navi bleats long as you want, I'm Vedas until I have arrived (or back inside in the lane) in place.
Other Navis calculate easily the next better way, the Tomtom 5150 but, only if you're not almost done, which is of course useless.

So that's for something of unfit. Without local knowledge that would be a disaster to go so!

I'm thinking at the time whether I should buy a Snooper S8000, Becker Transit 70, or Dezl 760LMT ...
But I have to do something that concerns the the same.

My Old Car Navi Navigon 8010 I had an external GPS antenna on the roof which was always super accurate. Although snowstorm was. So should be! Was just not a truck Navi, but otherwise very good.