> In Windows, the shittyness is much worse. Basically any Qt app is unusable with hidpi in Windows.
In my experience, it isn’t. On my setup (200% + 100% screens, Retina MacBook Pro in Boot Camp) KeePassXC, qBitTorrent, Qt Designer all look great on both screens; VLC has slightly weird fonts on the HiDPI screen but still works fine.
X11 apps do that. Firefox can run in Wayland mode, so run it in Wayland mode. vscode and other electron apps do not support wayland yet, so until they do (yes, they are taking their sweet time), you either need to run with integer scaling, or tolerate them being blurry.
In Windows, the shittyness is much worse. Basically any Qt app is unusable with hidpi in Windows.