Trash impossible to empty even in sudo

Well, my trash folder is full with the UnrealEngine folder, traditional empty trash returns permission denied.

when I try to sudo rm -rvf into trash it returns nothing, but when I check the UnrealEngine folder is still there and the Trash is still full, even after reboot...

I tried to delete the whole trash folder, reboot, and recreate it but UNREALENGINE IS STILL IN TEH GODDAMN TRASH....

I'm starting to loose my mind, any idea on how to get rid of it?

using KDE Plasma (Ubuntu 20.04 based)