I am using chrome on another pc with teamviewer but it becomes slow

Hey, my client has a website and I am working as a developer with him. He doesn't share admin access with me so I always access the site with TeamViewer but Whenever I access and open chrome in his pc team viewer becomes extremely slow. what is this issue? I need to make changes to the website on a regular basis. but due to slow speed, it takes a lot of time. this is the site in case you want to check. is this any script issue in this site or browser issue?