Hey i have checked it,
Your server provides very less php memory limit please check with them
Also try to upgrade to php 8.1
i also updated your wpbakery but problem seems how your server is responding.
Its very slow, we don't have this problem anywhere, even we have websites with hundreds of devices and services.
If you need better web hosting i can provide you in 9$ per month, else kindly do following
1. Deactivate each plugn one by one, and see if any plugin makes the problem.
2. Deactivate your current theme.
Also check what type of server your site is using, better would be a cPAnel hosting.