down dirt tracks?

My Garmin keeps suggesting to go down Alleys most of which go nowhere are dirt tracks and completely not what the route was selected for.

I note this issue has be on the forum before. New to Garmin I find it surprising there seems to be no solution to this problem unless i am missing something

Navigation \ routing - Keeps on taking me down dirt tracks.

After my 1000 blew up i reluctantly forked out on the 830 as i've become heavily reliant on the round tip and get me home functions as i travel around the country a lot and don't have a clue where i'm going.

On the 1000 this function worked well but on the 830 i've been asked to ride across farmers fields and dirt tracks, surfaces my pride and joy road bike really aren't designed for. Its become that bad when i was in the Peak the other day that i turn my routing off and resorted to using google maps.

My activity setting is: Road and the Avoidance setting are set (The the green bar next to them) to avoid toll roads, unpaved road, ferries and narrow trails.

Is anyone else having similar issues or could recommend any settings i may have missing before it goes in the big (as Its not fit for purpose: navigation on a road bike).

Sorry for the rant, its a lot of money and its not fun being lost!