I just tried printing the results page from our school demo site which is using Moodle 3.2 and a customised Boost theme. I'm attaching the PDF. I think it looks Ok. According to the documentation, since Moodle 2.9 it has been possible to print a quiz nicely. Your 2.8 will not print well, but your 3.2 site should. However, when you say the theme is Boostrapbase - I wonder if that is the problem? Have you tried with regular Clean or Boost?
Quiz
Print page looks messy in quiz overview page
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