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.
You will also need a good indexer. Ideally one that can be integrated into your nzb downloader and your media system. I’m using nzbget together with sonarr for TV series and a few indexers
I will need to check to which ones I actually have sonarr connected. I also use https://nzbgrabit.xyz which does not offer an API but it’s manual download of nzb files. It has most of what I’m interested in. Wait for a good offer to subscribe (like Black Friday)
I am using weeks and nzbgeek for over half a year without issue. That being said everything automatically pulls using sonarr and radar so if there is an issue I might not just be noticing it.