Heres a python script I made up from just modifying another script I use, it depends on qbittorrent-api, but to use just fill out the connection info and add all the trackers you want to remove in the TRACKERS array, I’ve included 2 rarbg trackers just as an example.

#!/usr/bin/env python3
import qbittorrentapi
import sys

TRACKERS = [
        "udp://9.rarbg.to:2770/announce",
        "udp://9.rarbg.me:2730/announce"
 ]

conn_info = dict(
    host     = "qbittorrent.localhost",
    port     = 80,
    username = "admin",
    password = "PASSWORD"
)

def main (argv, argc):
    qbt_client = qbittorrentapi.Client(**conn_info)

    try:
        qbt_client.auth_log_in()
    except qbittorrentapi.LoginFailed as e:
        print(e)
        return 1

    for torrent in qbt_client.torrents_info():
        #urls = []
        #for tracker in torrent.trackers:
            #print(tracker)
            #urls.append(tracker.url)
        
        torrent.remove_trackers(urls=TRACKERS)

        #torrent.add_trackers(urls=TRACKERS)

    qbt_client.auth_log_out()
    return 0

if __name__ == "__main__":
    sys.exit(main(sys.argv, len(sys.argv)))