Interesting. I was able to access the linked whitepaper and repositories without trouble and the 3rd party stuff too. Do you have local config preventing you from downloading the source code to review?
While I can respect your distaste for non-libre software, you’ll need to back up the malware claim. There are real security concerns out there in common non-libre; labeling things that are not libre as malware solely because they are not libre muddies the waters and makes your message much less palatable.
The claim is that audio and video are E2EE. I’m not sure how you’re unable to disprove that using the linked code, audit report, and COTS debugging tools. Can you expand on that? I see a lot of FUD without anything more than “they’re not libre” which, again, doesn’t do a great job of selling your point.