I tried in the past to wrap my head around usenet, and I bought access to some news downloader (iirc it was called that way not sure, but it was Eweka) and tried using it, the problem was that every download I tried to get was dead on arrival (link being dead, failing to verify file integrity) yet so many people on piracy forums swear by Usenet and claim that for ~$60 a year they get a much more superior experience than torrents, and yet, I currently torrent everything with no issues at all.
The reason for trying Usenet that when attempting to search some less popular TV shows/movies, I could not always find it in the quality I wanted to see, and therefore decided to give it a try.
well, my experience and use of usenet is kind of limited but the really goud stuff with (mainly) working links can be found on restricted boards. you at least have to register and access is not always open.
then you need an app like sabnzb and a good usenet provider (depending on what you seek).
mirc is or at least was a free irc client but if you get access to a well managed board that has your stuff you will just need sab. and a vpn of course.
if you just surf and search on your own there is a ton of crap, incomplete stuff, wrongly labeled files etc.