Keep "Civil3d as AutoCAD" as a native AutoCAD application without any C3D overhead, even if Country Kits or other Civil 3d enhancements are are installed!
We need native AutoCAD, too.
I do not get a native AutoCAD application any more (Tested using Civil 3D 2022 with DACH and Country Kit Germany installed), every time AECC things get loaded. Using "Civil3D as AutoCAD" from the windows start menu.
see: https://forums.autodesk.com/t5/civil-3d-forum/using-civil3d-2023-as-autocad/m-p/11619853#M483181