Well now I'm even more confused about why my connection to my #OVHCloud dedicated. I've installed iperf 2 and 3 (the remote machine I have access to on a fast link, but also in the UK, only has 2 installed). I'm using three network locations for the tests:

• Home is my local connection.
• Remote is the machine I have access to on a different UK network.
• The server is the one hosted with OVH in Canada.

And now I have the following data points:

• iperf3 from my home to the server can happily do 100 Mb/s UDP.
• iperf2 from the remote machine to the server can do more (it's on a faster network)
• iperf3 locally with TCP starts slowly but usually manages to reach 100 Mb/s.
• Wireguard from my home to the server struggles to get more than 2-3 Mb/s.
• scp from my home to the server gets a similar speed.
• scp from the remote machine to the server happily gets 100 Mb/s (probably more for a larger file, I tested only a 100MiB one).
• If I run nc on the server on a random port and send the data to /dev/null, I can transfer at 100 Mb/s from home.
• scp from my home to the remote machine.

So it looks as if something is specifically targeting ssh and wireguard traffic, somewhere between my ISP and OVH's Canadian connection.

From now on, whenever someone says that they’re an Alpha, I’m going to assume:

• Their memory order is so weak they do things in a completely nonsensical order.
• Their floating point unit is so decoupled from their integer unit that you probably shouldn’t trust any numbers that they provide.
• They speculate on values and do calculations based entirely on made-up numbers.