After trying Tranmissions (it works funny sometimes, changing the download directories and has few settings), rtorrent+rutorrent (some rutorrent addon destroyed all my seeding torrents, plus rutorrent is not working in LibreELEC so it seems it has no maintenance); I tried Deluge and I loved it.Can it be installed on LibreELEC as it can be, for example, on Raspbian?
It's not possible to install it directly (as above) and we have no plans to add torrent client apps to our add-on repo (we're a media distro and these apps are used to steal media) but if you're using Generic/RPi/imx6 we support docker and someone has probably created a docker container for the app.