Comment by omnimus

It's not a nightmare. It's the most popular gui/document/app platform for a reason. It's complex because it has to cater to many types of usecases. Name one platform that's better. I think people have tried and some might have even succeeded in limited slice of what web can do.

I have strong suspicion that it's exactly because of the “document” history why web is so approachable to creators, why there is “view source” and ultimately why you can hop from simple html blog, to CRUD app, to advanced CAD software.