> Basically, they are completely hostile to feedback from people who've spent their entire career doing CAD.

There's an entire working group in the project comprised of people who have spent their entire career doing CAD and now take care of making FreeCAD get on par with proprietary counterparts.

There are numerous discussions online where users have constructive conversations with FreeCAD devs and provide useful input to mutual benefit.

Would you care to point me to a discussion where an actual FreeCAD contributor is completely hostile to someone like you?