[Bu9818]

For faster session establishment in OpenSSH consider ControlMaster in ssh_config(5), which multiplexes multiple sessions in one connection instead of creating a new connection for each session.

[mynameisnoone]

    # ~/.ssh/config
    # Place at the *End-of-file*
    Host *
      ControlMaster auto
      ControlPath ~/.ssh/sockets/%C.sock
      ControlPersist 600

      ServerAliveInterval 60
      ServerAliveCountMax 10
      IPQoS throughput
      TCPKeepAlive yes

      # :: Security Exception :: Purposeful for UX usability of machine-to-machine hops
      ForwardAgent yes

      # ssh-audit recommendations https://www.ssh-audit.com/hardening_guides.html 
      #
      CASignatureAlgorithms [e-mail],ssh-ed25519,rsa-sha2-512,rsa-sha2-256
      HostKeyAlgorithms [e-mail],[e-mail],[e-mail],[e-mail],[e-mail],ssh-ed25519,rsa-sha2-512,rsa-sha2-256
      HostbasedAcceptedAlgorithms [e-mail],[e-mail],[e-mail],ssh-ed25519,[e-mail],rsa-sha2-512,[e-mail],rsa-sha2-256
      PubkeyAcceptedAlgorithms [e-mail],[e-mail],[e-mail],ssh-ed25519,[e-mail],rsa-sha2-512,[e-mail],rsa-sha2-256
      KexAlgorithms [e-mail],curve25519-sha256,[e-mail]
      MACs [e-mail],[e-mail],[e-mail]
      Ciphers [e-mail],[e-mail],[e-mail],aes256-ctr,aes192-ctr,aes128-ctr
      # GSSAPIKexAlgorithms gss-curve25519-sha256-,gss-group14-sha256-,gss-group16-sha512-

[ColCh]

looks like there is no Compression=yes ?