Hi Richard,

Thank you for sharing your experience with QuickBooks. I'll provide details about why a user experiences such a thing.

A poor internet connection is one of the causes of having slow QuickBooks. Please check out your internet speed to see if it, at least, reaches 3 Mbps. Another reason is not meeting the system requirements. Please check this article for more details:  Why is my QuickBooks Online slow?

On the other hand, you can also clear your temporary internet files to free up your browser's cache. Here's an article for your reference: Clear cache and cookies to fix issues when using QuickBooks Online.

If you have any other concerns, please don't hesitate to go back to this thread. Take good care always.