The best alternative is one that you can self-host and/or isn’t centralized.
My favorite option right now is torrents-csv.ml, since it’s “a collaborative repository of torrents, consisting of a searchable torrents.csv file.”
Basically, the author of the project scrapes the torrent DHT network and compiles a csv of all the torrent magnet links into a CSV file that’s searchable on this site. You can selfhost your own private instance of the site by following the instructions on the repository here: git.torrents-csv.ml/heretic/torrents-csv-server