Hey Brother!

some months back, I encountered with same problem..

you can solve this by :

1. Go to kali-tweaks -> Network repo (something like that) -> select Cloudflare CDN then HTTPS from below

save that, Now try update and upgrade , it will be solved now

Hey

Its not a problem while using Kali, like "sudo apt update" or whatever.
The problem is that I cannot download the Kali ISO from the official site (very slow download that fails).
Hope this helps?

check your internet connection or connection to serwer if it's missing packets

use torrent to download

how?

Please try to download using a bittorrent client. There's a "torrent" link for most Kali images (except the weekly image). Click this link, and open the .torrent file with a bittorrent client..

Otherwise, try downloading the image from the command-line, using wget IMAGE_URL (replace IMAGE_URL by the image URL) and copy/paste the output here, so that we can see what server you download from.

Please read over this and update the bug ticket: https://www.kali.org/docs/troubleshooting/download-speed-issues/

This will allow us to locate the community mirror thats having issues.

This report has been filed against an old version of Kali. We will be closing this ticket due to inactivity.

Please could you see if you are able to replicate this issue with the latest version of Kali Linux (https://www.kali.org/get-kali/)?

If you are still facing the same problem, feel free to re-open the ticket. If you choose to do this, could you provide more information to the issue you are facing, and also give information about your setup?
For more information, please read: https://www.kali.org/docs/community/submitting-issues-kali-bug-tracker/