Request support before to left bad review for someone.
When the plugin is running in thousands of sites, probably the issue is in your server.
For example: Run the site with WordPress low memory limit. And many others.
Usually, in our dashboard we left notifications about issues and we have tools to help to fix it.
We have also a troubleshooting page to help users: https://siterightaway.net/troubleshooting/
And, of course, we follow the support forum and answer the questions.