Good afternoon,
I have a somewhat similar issue when printing linked Excel spreadsheets, but never this bad. I have an Excel spreadsheet linked in this file, and when I zoom in and out of the view, it will look strange for a second, and then update and will look correct. When I print the sheet however, it is unreadable (see attached). I am using a version of the Bentley PDF printer driver and trying to print a 11x17 sheet model to a 11 x 17 PDF (1:1 scale). Any idea why this is happening? I tried adjusting the raster quality, but it didn't do anything.