Piracy: ꜱᴀɪʟ ᴛʜᴇ ʜɪɢʜ ꜱᴇᴀꜱ

I have setup a full *arr stack on my home server about one year ago. I am having some trouble finding some specific content that is not listed by popular public indexers (mostly TV shows with lots of episodes). However, my friends can find the same content in stremio, so I know there are torrents of the content out there. I have asked them to share some magnet links to specific media the *arr stack has failed to source, and I have tried to trace back their origins.

What happens next is, I register to the newly found private indexers when I can, and request everything again through prowlarr. Still, there is specific episodes where are not found, and I have to get back to step 1 and do everything again. That makes me realize that my setup is not as robust as I would like.

I wonder what you would recommend me do. Right now, I can think of two solutions. I can try to register on more private trackers that are invite only by asking around (I appreciate any invitation links), or I can try the whole usenet workflow. Of course, using stremio is a possibility, but I would like to improve my own setup if I can.

What is my best bet here? There are only a few shows where I'm struggling with. For most of the content I request, my setup works smoothly.