I've reverted this change, see changeset/63781129

I've reverted this now, see
changeset/63780997

I think only a few renderers use the tag area:highway, see also
osm.wiki/Proposed_features/area:highway#Rendering

You wouldn't be the first, see e.g.
https://github.com/gravitystorm/openstreetmap-carto/issues/180

You can find all bad ways using this overpass query:
http://overpass-turbo.eu/s/CZS

Hi and welcome to OSM!
I've noticed this changeset because of the multipolygon relation with just one inner member:
relation/8833646
The inner way way/636204264
describes a very small area, so I think you created this accidentially, as well as the multipolygon relation itself. Ths can happen when you press Crtl+B in JOSM, the hotkey to create such a relation.Besides the edit looks good to me. I did not yet repair the above problems, please let me know if you need help with that.

Hi and welcome to OSM!
You added a lot of ways without any tag here. I think most of them describe buildings, so the tag should building=yes Please don't connect buildings with highways like here:
node/6001720836
If you want to add a node close to another way press Ctrl when clicking on the left mouse button.
Hope this helps, happy mapping!

Do you need help to revert the changes done?

Hi!
Du hast hier aus einem highway=service ein highway=parking_aisle gemacht.
Ich habe das korrigiert, siehe
changeset/63748087
Mit highway=service + service=parking_aisle sollten nur die Wege auf Parkplätzen erfaßt werden, die nicht auch der Zufahrt zum Gelände bzw. Gebäude dienen.
Bing scheint da auch noch einen weiteren Parkplatz zu zeigen. Kennst Du Dich vor Ort aus?

Hi!
I've noticed several self-intersecting ways in this area like this one:
way/635269971
Please watch out to avoid this. I've fixed some problems here:
changeset/63747824

I think I did not change it myself because the sat images seem to show that the road is already (partly) razed. You probably know better.

If a highway=residential is closed, the tag would be disused:highway=residential,
not highway=disused.

Diese Kreuzung sieht besser aus, aber stop_line gibt es noch immer ;-)
Du kannst die z.B. mit overpass finden:
http://overpass-turbo.eu/s/CXS

Oops, forgot to update source :
Bing; Esri World Imagery

Some more hints:
for a mini market you may use shop=kiosk,
see shop=*#General_store.2C_department_store.2C_mall

Hi and welcome to OSM!
You added two buildings here with a lot of details. That's fine. The problem is that you didn't add those tags to the already existing way, instead you created two copies.
To add tags to an existing way in JOSM, select the way and press Alt+A to add tags.

Hi again!
This changeset duplicated a lot of building nodes. Please note that you are changing data in OSM, not in a training database.

Hi and welcome to OSM!
I've noticed that you changed a lot of ways from highway=residential to the less precise highway=yes here. Was that intended?

I've now seen that you also use JOSM :-)
Please use the validator to check for duplicated nodes in this area.

Hi and welcome to OSM!
I see that you started to fix sidewalks created a 8 month ago. I think many of these ways are probably not needed at all.
Do you know the sidewalk tag? See osm.wiki/JA:Key:sidewalk