To me the biggest problem is very complex websites that start downloading content after the page loads. For example, Facebook. Page loads, get displayed and on

To me the biggest problem is very complex websites that start downloading content after the page loads. For example, Facebook. Page loads, get displayed and only then it starts loading content, ads, navigation, etc. The second problem is super-slow scrolling. Only my new i7 laptop with 16gb of RAM can open Facebook smoothly.