Aspects of modern HTML/CSS you may not be familiar with

I really do appreciate the nesting they've added but looking at it as a whole, CSS is a really strange and in my humble opinion, a terrible language. Perhaps I'm just holding it wrong, but it's just so complicated and messy, it sometimes feels like you're just arranging arcane runes in different ways until you make it sort of work for you. It's both a system for styling text based on inheritance, and a layout system for block and inline elements, nested recursively but without inheritance, only containment. I think it was a mistake to combine styling and layout, and I don't feel like adding more and more capabilities to something fundamentally broken can fix it.

I disagree, I think most of these opinions I see about CSS are from people that haven't taken the time to learn it and particularly to understand the cascade.

Many years ago I did a very deep dive into the CSS specs as I was researching for a new implementation and it struck me as well designed for its purpose of separating style from the semantics of markup.

I is certainly true for me that I didn't take the time to learn the intricacies of CSS behavior and I still think the cascading properties are the worst feature, namely concepts like specificity. It is hard to keep a mental model of styling rules and at some point it is just degrades to trial and error.

Nobody came up with a better alternative though (apart from the many dialects that transpile to CSS again).