what is your hardware problem?
Once on the client side, it felt like those also needed to cache things. The only client that worked semi-well wasn’t a Jellyfin client, but could read from a Jellyfin server. I think it was called InFuse. With that as well, I spent hours simply navigating the app, going to every page, and waiting for it to cache everything so I could then navigate around. Then if I added something new, I needed to go to a page to show it and get it cached.