no it's not. No game needs more than 1Mbps download, ever. Nor do any games need more than 512kbps upload ever.
Anyhow I finally managed to figure it out.
10-15 KB/s download speed and 6-10 KB/s upload speed is all I need.
Then why are you asking?
Could you upload your cncnetclient.log file please, found in your game directory
It's already attached to my original post
Can you try update 2.23? If same problem, please upload a new client log file.
No more issues after 2.23. Thank you!