Take 1/2 a minute just to sign in to eBay with 100meg connection. 100 meg can download and view 8 movies at the same time. It is not my server, it's eBay.
I have possibly the slowest access on the planet (and I'm exaggerating only slightly). I actually share wifi with my next-door neighbors. It's their wifi account (and all the equipment is at their house), and I pay part of the bill for access.
My pages, including log in, are loading fine.
I'm not saying you don't have a problem. I'm just offering up that it's not universal.
**Chrome browser on a cheap, little, netbooky-type Windows 10 device.**