Why look for a Tournament Director alternative?
The Tournament Director's configurability is its case: its pages describe over 100 pieces of information a display can show, a screen-layout designer, leagues and seasons with a statistics database. If you want to shape a big-screen display on one offline Windows PC, that is the case it is built for.
The friction is in what surrounds that. The vendor's FAQ says it runs only on Windows, the Personal licence ($49.99, one time) is for non-commercial use on up to three of your own computers and one event at a time, and the Commercial licence is $299.99 a year on one computer. Its pages do not publish online player registration, cloud sync or a packaged mobile or second-screen view. They describe a second display on the same PC and a Status Updates feature that pushes tournament data to a web address you set up yourself.