The dots are probably from the Angular dimensions. If you explode one, it's composed of a Text object and 2 zero radius Circles (hidden).
I didn't get any big dots when I saved your drawing as a JPG, just a blurry picture. This was with the Dimensions layer on and off.
When saved as a DWG and opened in TrueView, I got a bunch of extraneous lines; probably where you're seeing big dots.
When I printed a paperspace page to PDF, I can see 1 pixel dots from the Angular dims, but it's also much cleaner than a JPG.
Designer, Deluxe, (Professional, Expert, Basic), Platinum
Windows 10 Pro (1903), 64-bit