If you need a daemon (to always run in the background, like on a server), use Deluge or Transmission.

If you just need a basic client that can live in your systray, qBittorrent.

I agree. My .zshrc is littered with functions. Most useful ones are my pack and extract I made ~10 years ago, they just recognize file extension and use the correct tool.

I will say I had a lot of trouble with Bluetooth (bluez) on Linux, but I think it mainly comes down to the implementation. I have a cheap dongle and pairing gamepads has been a nightmare sometimes.