Note that none of the larger roads leading to the roundabout at the top-left is named, while some (but not all) smaller streets names are here. Instead you have the "D509" label copy/pasted haphazardly but that's not the actual name of the boulevard that would be used on a post address so it's of very limited use (and even leaving those labels in there's plenty of room to add the actual street name).
I think the D509 type of issue is just a trade off. At least when in happens in the US: It is the "official" designation and can be used on Post, while the local name changes from town to town. That is less of an issue when navigating within the same town, more of an issue when navigating through towns: Go 30 miles along a "CR" county road and it might change names 4 times. Rather confusing for directions to make it look like you have to travel down 4 different roads for that one leg of the journey. I suppose Google could show both though, depending on zoom level.
Note that none of the larger roads leading to the roundabout at the top-left is named, while some (but not all) smaller streets names are here. Instead you have the "D509" label copy/pasted haphazardly but that's not the actual name of the boulevard that would be used on a post address so it's of very limited use (and even leaving those labels in there's plenty of room to add the actual street name).
Here's Open Street Map for the same map at a similar zoom level: https://svkt.org/~simias/up/20191219-175553_map-osm.png
OSM doesn't have all the bells and whistles of GMaps, but as far as the map itself it's vastly superior IMO.