Ok I get your point, but I still believe there might be better data available (maybe not on Bing or Google maps). I will try to make comparison shots in P3dv4 (with the Austrian Professional HD Addon) and MSFS2020. Unfortunately I have a broken ankle and cannot sit in front of my desktop PC, so this might take a few more days.
The above mentioned addon is available via flugwerk.at and was at least covering the whole area of austria without showing sharp edges, poor colours, snow coverage, etc. Some screenshots can be seen on thehomepage, but the respective areas of poor bing map coverage are not displayed there. So I guess there might be a source for better images and have read so on other forums that those exist for Switzerland as well. Do not know about Italy, but there wa a decent product for Slovenia as well.