I think network problems sometimes can be common during websites loading or culprit, I too had such experience when trying to access the site, well slow loading sometimes can be much frustrating than ever especially with a slow connection just like him made mentioned Nigeria, So I had to go and download the app to resolve the issue I was having, and hopefully I'm yet to find any favourites game to play for now.
I'm from that region but I can't relate cause the network works very fine where I am it loads very fast whenever I want to visit the site, maybe switch to a network that's not very poor for instance I make use of two different networks and if one isn't given me the quality or speed I need I'll switch to the other and it works perfectly so he could do same too.
It is great that you've found a workaround by using two different network, this can be helpful tip for others experiencing same issues.
Network problems sometimes can be more frustrating, especially when it about slow loading just as you have said switching to a different network or using an mobile app which can sometimes resolve the issue.