4- ettercap doesn’t open. After choosing the mode then click run it disappears

Works for me, in latest Kali "2021.2". Try to run it from a terminal with "ettercap-pkexec -G" and see what happens?

1- apktool can not rebuild payload after creating it by msfvenom
2- hydra show false positives results (user and pass)
3- metasploit ( exploit complete but no session )

I'm not familiar with these tools, are you sure there's really a problem with Kali here? It looks like that you need help and guidance to perform some task. We have community support forums on https://forums.kali.org/ or on IRC with the #kali-linux channel on irc.oftc.net), please post your questions there.

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/