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.

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