Yeah at that point just pirate things. Much easier and I don't think even the most moral person could argue against pirating something you can legally access anyway.
Sounds like a job for a bot that follows your Plex / Jellyfin history and clicks play on the original streaming service. You get to avoid whatever terrible UI the media conglomerate shackled their content to, get a persistent copy that works offline, and the creators still get paid. Everybody wins :)
Doubt an emulator will help.