This seems to be an old bug in qBittorrent client which is not yet marked as fixed. Look at Automated download from RSS problematic and here
So here are a couple of routes you could try to get those torrents:
1. Use KTorrent with the Syndication plugin. You can define filters ( .LOL.HDTV ) and how ofter you want to refresh the rss (like qBittorrent.) And afaik this does not have the qBittorrent bug.
2. If you must stick to qBitTorrent, then taking a cue from the 2nd link above, you could
a.) first setup FlexGet
b.) List items you want to download into a configuration file. Here's a good tutorial for it. This tutorial uses the same showrss site as you want.
Basically, here you provide a folder where all .torrent files would be downloaded, e.g. ~/.torrent
c.) the init the flexget
d.) In your qBittorrent settings, select automatically select torrents from ~/.torrent.
e.) Schedule flexget to run every few minutes and along with it start the qbittorrent client. This can be done using Gnome-Schedule and a simple script file rss.sh. Put the below content in the rss.sh file:
/usr/local/bin/flexget #start flexget to download all .torrent files from rss
export DISPLAY=:0.0 #required to run gui apps such as qBitTorrent
/usr/bin/qbittorrent #run qb, which will pick up .torrent files from the ~/.torrent folder
In gnome-schedule, set the above script file. And you are good to go. Here's the tutorial for the last part.
Make sure that crond service is set to run on bootup and you are good to go.