Torrent in question is this one

All was going well with the initial seed. Saw some high speed connections to Europe were taking most of it. Then suddenly at around 80% it stopped uploading. I've tried changing machines, clients, and even connections, but to no avail.

My connection is capable of around 1-2 MB/s upload but qBittorrent just cycles through peers failing to connect to any of them. Transmission manages to connect to one or two but struggles to get over 0.5 MB/s.

I can see there's 42 peers, 23 seeds right now. But as far as I know none of them have the complete torrent other than myself because the ratio in QB is sitting at 0.81. Is there somwhere I can see the health/availability to see what the situation is?

Anyone got some tips?