You were asking to be provided tech support here:
> Which of these packages is proprietary? I was doing this in VirtualBox without guest additions installed, and while I used to boot this installation on an NVIDIA system, I don't believe I had any NVIDIA-specific packages on it. Let me know the proprietary package name(s) you think I had and I'll search to see if I had any of them installed.
(Also, how would you do that if it was already wiped? Edit 2: yea.... because as not tech support I have read everything you have posted on your problem and am aware you have backups)
You were acting pretty entitled to this other person's help here:
> What "it" are you even talking about? I didn't "choose to ignore" anything. I Marked all Upgrades, clicked Apply, rebooted when it was finished, went to see if there were any more upgrades (there were some), tried to mark & apply them, and was greeted with this error. Apt/Synaptic got me into this broken state and couldn't get me out of it. I don't know what story you're reading, but it doesn't seem to be what I've been writing. There was nothing for me to ignore. The error wasn't something I ignored; it was the problem.
Edit: Oh and that's a perfectly civil response to you continuing to tell people who know how these systems actually work (which does not include you) that they are incapable of understanding what you are writing and implying that they are somehow delusional.