I don't care how much effort you spent, I care about what is reported to waydroid devs. maybe instead of bashing your head against a wall, try reporting the issue. could be a lot more productive, waydroid works on intel and amd gpus, and will automatically fall back to software rendering on nvidia gpus.

there are a couple known issues around multi-gpu that are being worked on, but doesn't seem to be your issue. wayland works fine, X11+wayland works fine. xfce, lxqt, etc work fine when using a nested compositor. at this point, I can only assume the issues you have are made up in your head to try and shit on waydroid project.