I am using Symphony it’s licensed under gplv3 and plays every audio format I throw at it. Also it has a basic, but beautiful ui. It also has a feature to make playlists

Proton only allows port forwarding on their paid tiers, and you still need to enable it and select a server that allows port forwarding.

I would simply use something a little less fishy and cheaper AirVpn you can pair over there also with montero and some other crypto

Really depends on how much of a niche the things you are looking for are. Content is quite easily to search with postman. As I personally don’t really use private trackers I don’t have a lot to compare to, but most torrents I have stumbled upon had a healthy amount of seeders on i2p

Have been using it for quite some time now and honestly I have found almost everything I searched for and once you set the router bandwidth properly, I was capable of downloading and seeding with 2MB/s. Satisfied my needs and gotta say not worrying about Letters coming to you is very calming

Pretty sure there is an unofficial flatpak for makemkv

https://flathub.org/apps/com.makemkv.MakeMKV