... certain parties violating the old license, by not attributing and stripping my copyright. Packagers being collateral damage was a beneficial side-effect, considering they don't clearly mark their versions as modified (also a GPL requirement), break functionality, and expect upstream to provide support.

Emphasis mine, snipped from the authors comment

As a maintainer of few AUR packages this is always so hurtful.
Where does this position come from? Packaging is the avenue that people using any linux distro use to get your software. This also my first time hearing that packages (re)building GPL code have to mark the packages as modified in some way. I can understand that being a valid concern (if it is one) but that's a problem that can be rather easily fixed without throwing all of the maintainers overboard (?).

I can see there being bad maintainers that will come shouting to upstream with every little thing that does not work on their platform, but man that's just insincere towards maintainers that will dive, analyze and help where they can to make it work.
For every one maintainer coming to your github issues with their problems there is probably shitton of patches and time spent on making your program work with the given distro.