This is definitely the best way. I happen to be running into scaling problems. It's converting the file into metric even though my document settings are in inches. Might be good to ad this fix to this video. For the sake of clarity... my comments are not criticisms, just my experience. It's hard not to love Fusion for cost vs power but sometimes I hate it. Going to reach out to Fusion team. Thanks!
WARNING ! ! ! Just like to point it out if you haven't noticed. it does not save that projection you made as a DXF. Fusion actually saves the "sketch face". You can just make a sketch on that face, without a projection or lines/geometry and get a DXF. It makes the "sketch face" or blue shade area into a DXF. you will be upset if you have counter bores or counter sinks and try to save a projection thinking that is what you'll get. I know.
You say it results in problems, but don't show or state what those problems are. What if your item is a simple flat piece with a few holes (no bends) do you still need to go through all this? What happens if you draw something up and don't create an item as a "sheet metal part" how does this impact the export. So many unanswered questions.
Definitely understand where you’re coming from. The purpose of the video was to be quick and provide a reliable method that works regardless of other factors (like the title says). Going through all of the possibilities would be a good idea for another video (or two) but would have made this one too long
What difference would it make if, after pressing create flat pattern, you press the export DXF button next to finish flat pattern? That's what I usually do and so far there hasn't been any scale failure, but maybe there is a risk of that?