Waiting times on the backend aren’t connected with the selected theme. They are more connected with hosting services or inappropriate plugins. Please try to remove unwanted plugins and check the host for malware with your hosting providers.
I did several tests, including disabling all the plugins and despite this, the problem on the backend remains: creating a post, it takes more than a minute to save it and it happens the same every time you make a change in an article, when you save it takes more than a minute. I can’t solve the problem and start to despair. Plus, server managers don’t care how they should and I’m going crazy… Would you be able to give me a quote to enter you backend and solve the problem?
