I was unable to remove a file anymore with thunar:

How should I create the "Trash" folder ?
My trash works on xfce and here's what my directory structure looks like in ~/.local/share which is the only place I have located a Trash folder:
drwx------ 4 myuser myuser 4096 Jun 18 10:12 Trash
drwx------ 3 myuser myuser 4096 Jun 18 10:12 files
drwx------ 2 myuser myuser 4096 Jun 18 10:12 info
Based on this...
mkdir ~/.local/share/Trash
mkdir ~/.local/share/Trash/files
mkdir ~/.local/share/Trash/info
and
chmod -R 700 ~/.local/share/Trash
looks right to me.
So, you're trash bin is not a regular directory, but a gvfs volume. The most likely cause is that you don't have gvfs installed. See https://wiki.archlinux.org/index.php/Thunar#GVFS_and_trash_issue. Replace the pacman command with your distribution's package manager.