A lot of folks are talking about how a centralized repository would be a big target for governments, ISPs and rights holders, but I have a different angle.
Who is going to pay for all of that development and maintenance? We are pirates. We don’t pay for stuff. It’s kind of our thing.
Additionally, you are proposing an option with social features and algorithms. Both are a negative because they necessarily encourage users to explicitly say what they have been downloading or uploading in a way that is being logged and therefore is evidence against them should a media company want to push for legal action.
Enemy and Jellyfin both have Android TV and Roku apps. I don’t have an apple TV, but I imagine apps exist there too.