Hello,
After testing your website to get a first impression of what may be going wrong, I got a 500 server error, indicating that the problem might be quite deep.
I am an expert in server development and would like to take this opportunity to both help you and build my freelancer profile up some more.
I'm sure wonders can be done quickly once I get access to the server part to try and debug it and make it quicker.
Thank you for reading my proposal
PS I know my bid is higher than the project's original budget, but it's because I know how much work is required and how long it really is going to take.
I won't promise to get down under the 3s bar within 3 hours, but I am hopeful that with a good look and proper CDN use, we can get your loading time to a much more acceptable time.
Best regards