Bad routing in Italie with TomTom Go Mobile

Yesterday when we visited Venice and drove over there from Lake Garza, it put me on a small gravel road with large dents in it making me have to drive 10km/h to prevent my suspension from breaking down.
I have TomTom set on "fastest routes" and no limitations on toll roads, etc. I really do not understand why it directs me onto these bad gravel roads.
I navigated the route back from Venice to Lake Garda with Google Maps and was directed on highways and good secondairy roads, no problems at all.
Comments
Welcome to the Community!
I'm sorry to hear of your bad experience with GO Mobile! Routing problems are often related to map data and you can report them directly to our map team with the MapShare Reporter. The following video gets you started:
[video]
Table of contents for the video
• Logging in: 0" 30'
• Speed cameras: 1" 00'
• Report status': 2" 10'
• Missing street: 2" 20'
• Speed limit: 3" 05'
Cheers, Mikko
Superusers
Routing algorithm is of course also a factor. It's mostly quite hard to say. In case it wouldn't be a map issue the map team can forward reports to the relevant team for further investigation. Of course Customer Service is also one channel where these can be reported for further investigation.
Cheers, Mikko
If not, that's probably the reason