A magnet link is basically a torrent of a torrent, so the answer to your question is going to be the same as "why won't this torrent download quickly / at all?".

It could be:

• No seeders
• Firewall rules blocking DHT
• No port forwarding

1. Dead torrent
2. Your Internet blocks torrent/DHT traffic.

If magnets, then there's less info in the link itself (compared to a .torrent) and that needs to be located. If availability is shit, that will be hard/impossible.

Go to the connection settings and copy the "Port used for incoming connections". Paste it into a service like: https://www.yougetsignal.com/tools/open-ports/

If your port isn't "open", that's your issue. You need to configure port-forwarding in your router or VPN client.

Sometimes I paste a list of open common trackers into the details and it'll fnd some peers that way. This is for public torrents only, ofc.

Not exactly the place to ask, but I can't seem to get to the piracy page to make a post