are you actually reviewing these objects?

In this changeset alone, I was able to find 10 more objects almost immediately that suggest that this was not manual review. none of these appear to represent an actual building on the map.
https://www.openstreetmap.org/way/1196635281
https://www.openstreetmap.org/way/1196635266
https://www.openstreetmap.org/way/1196635270
https://www.openstreetmap.org/way/1196635278
https://www.openstreetmap.org/way/1196635275
https://www.openstreetmap.org/way/1196635287
https://www.openstreetmap.org/way/1196635298
https://www.openstreetmap.org/way/1196634418
https://www.openstreetmap.org/way/1196634116
https://www.openstreetmap.org/way/1196636208

I also find it extremely suspicious that you have added nearly 300,000 buildings in under a week.

If you aren't manually reviewing all objects, you need to follow the import guidelines and automated edits code of conduct
https://wiki.openstreetmap.org/wiki/Import/Guidelines
https://wiki.openstreetmap.org/wiki/Automated_Edits_code_of_conduct