I finished my switch back to #debian #bookworm
I did still have some new issues that I didn't from when I'd originally installed #bookworm at release 12.1, and it seems since then some updates create a few niggles with certain self-compiles.
Resolved the last of my libqt5widget trackback errors by setting #qt5ct back to gtk2 rather than #kvantum. For whatever reason, that combination caused applications like #avidemux to fail to run. I had issues compiling that as well, but overcame them by fixing a typo in one of the cmake files.
Anyway, back to a stable and working environment.
Going to spend time in a virt-manager VM to test out #trixie as a clean install with #kde as the DE. I think having KDE as the base DE and then setting #gtk theme support is the better way around, and more of the apps I now run are Qt-based nowadays, and that seems to be a trend that is growing.