For fun I opened in Estlcam, which handles complex (and maybe not the cleanest drawn, my fault) dxf better than other programs I've tried.
We aren't even talking to the same guy (; there are multiple people in this thread. Your screenshot is from a January file, different person and long resolved. Regardless, the constant EstlCAM ads are great, but OpenBuilds CAM is FREE and just requires clean Polyline files. Sure its not as magical at fixing but learning to fix files is a great skill. I consider this once and for all resolved. Spend a little time (and loyalty) learning it too, just better if our Mods actually use our stuff (;