I've been using PIA for probably over 10 years and haven't had an issue even after they were sold. Last I heard they still don't keep records so there's nothing to worry about.

I rarely have issues finding things on Usenet. Even old shows and movies. Sonarr and Radarr are a more convenient way to find what you’re looking for. Your indexer May be the problem or it could be your provider. I’d suggest getting radarr and sonarr to see if that will help find what your searching for. If you’re still not getting the results you want you’ll want to invest in another indexer. Personally what I have may be overkill but I have Newsdemon, Eweka, Usenetexpress, and newshosting for providers and 5 different indexers, several which are private.