Other people have kind of touched on this already, but clients prioritize connections based on stability and speed so things like seedboxes often get utilized more than your average home client to saturate a downloading connection.

I also noticed that my max upload speed is much less (e.g. 2MB/s) than what I get with speedtest (e.g. 7MB/s)

Again, other people have touched on some bottlenecks that can cause this (y’all are good lol), but clients also have a bit of connection overhead that will ultimately affect your maximum upload speed to peers at a varying degree. Here’s some details, if it helps:

Overhead- Additional data used and required for communication and coordination between sender and receiver that is not part of the payload data actually being transferred.

Is there someone who solves my subtitle issue?

Yes! Bazarr is specifically made to make this task completely automated. Other people have mentioned Radarr and Sonarr, there’s also prowlarr/jackett for adding uploaders to grab from. I’m using this setup, along with overseerr to handle grab requests, and as soon as I click a button to request media it usually shows up in 10-20 minutes on the server with subtitles. If you’re interested in setting any of this up feel free to DM me!

Alternatively some great folks have been working on something potentially even better that uses Debrid to speed up the time it takes for the media to be on your server: https://lemmy.world/post/6196363

I have barely looked into this and I really couldn’t say anything for sure, but you might be able to use that+Bazarr to accomplish the same thing.

I don’t disagree with your definitions of legality, but I do disagree fundamentally that ripping a movie should be under the same umbrella of piracy if the intent is not to distribute.

Even blurays that offer a bonus “digital copy” are redeemed through a third-party that packs it with DRM so you can’t use it for your own media server. How are they even supposed to enforce this absolute assanine law that I can’t watch the damn movie that I bought on my own terms?

How about Prowlarr too? The site looks great

It looks like they do tracker requests through their discord: https://discord.com/channels/264387956343570434/1066174962622287874