Every fedora kde install is broken and results in a black screen of death

The installer does work for many users and it is not only Windows that sometimes changes metadata on USB drives. When reporting an issue you need to provide enough detail to allow others with similar hardware to reproduce the issue, see: https://discussion.fedoraproject.org/t/inxi-the-help-to-help-your-selves/180413. You can try an installer respin from https://dl.fedoraproject.org/pub/alt/live-respins/ in case your black screen issue was fixed by an update. You should make sure you have all vendor firmware updates as new kernels often require firmware changes.