Depends on the theme you use. In KDE Plasma it looks a bit weird because it's Qt6, but Plasma is migrating to Qt6 in the following months.

Used it for a while as a KDE Plasma user, but one day I realised that qBitTorrent is also built using Qt and simply went with it. It is basically the same thing but more refined.

My usecase is very local in local pirate groups, so I don't have info on other countries. Just dig deep enough in DuckDuckGo and I am sure you'll find something, like I did.

Acestream is an alternative system I've used succesfully a few times.