Please give me the site URL so that I can check what is the problem and whats the opportunity has. I can optimize your website to make it faster than your current speed. I will optimize the image, CSS, JS, reduce page size and server request, set up a free CDN and cache plugin. So that, your visitor get the best experience from your site.
I'm an expert in WordPress speed optimization and already work for a lot of my personal clients.
I can start right now and wait for your reply for more discussion.