@Carmelo_DrRaw runs fine in Gentoo, but the Qt theme/engine seems to be missing:
When I run my own build it looks like this:
The console output of the AppImage shows relative paths could be the cause:
https://bpaste.net/show/07a0b5eec820
It asks me every time I run it whether I want to install a shortcut.
The console output also shows you’re using glibc-2.14, is that correct? It’s probably not a problem, but it is 5 years old.