Any GUI Linux directory comparison tools that work?

I tried KDIFF3, it crashes partway through comparison. I understand that v1.10 has a bug and crashes when a directory has symlinks in it, as my home folder does.

I tried KDIFF3 v1.12 via the abomination called Flatpak, but it also crashes partway through scanning.

I tried MELD, it just hangs there "scanning" but uses no CPU and is doing nothing...

Ideas?

#Linux

@dancingtreefrog no gui tool, but good old cli diff?
@dirkdierickx How can I use CLI diff conveniently remove files in one of the compared directories?

@dancingtreefrog use the command;

diff <(ls /directory_abc) <(ls /directory_xyz)

to compare two directories.