Slow torrent upload speed (linux iso)

I think contacting Fizz would help in that matter and besides its common to have really slow download of torrents since it involves seeds. Hope your issue gets fixed

Sometimes ISPs will intentionally throttle torrenting/P2P to prevent piracy so, I wouldn't be surprised. Just try a VPN and see if it makes your speeds faster.

Sometimes, it's not even ISP's but the backbones : https://www.eyerys.com/articles/news/internet-backbone-provider-cogent-blocks-users-accessing-torrent-websites.

I'm working for an ISP (not Fizz nor Videotron), and usually ISP do not block torrents, but will priorise VoIP, streaming and browsing on their network.

I'm working for an ISP (not Fizz nor Videotron) and sometimes, it's not even the ISP how blocks torrents, but blackbones : https://www.eyerys.com/articles/news/internet-backbone-provider-cogent-blocks-users-accessing-torrent-websites

Most ISP are not blocking torrents, but their policies priorises browsing, streaming and VoIP rather than torrents, to give a change to anywone using the network to have a good speed.

cable speed varies by area

In your fizz router, check if the firewall is at low level. medium will block P2P