In general I like CSS, but ...

a) they keep on making CSS more and more complex. You can reason in favour of it, of course, but it is undeniable that CSS becomes more and more complex - and complicated, too. Which leads us to b)

b) "CSS Subgrid is a good example. Subgrid is a super-powerful extension to CSS Grid which enables entirely new layouts."

Well ... I wanted two flexible divs side by side. It is possible, but there are like 5 different main strategies for this, grid is one of them.

Now via a "subgrid", they acknowledge that the existing ways SUCK. So they add yet-another-component here. This reminds us of:

https://xkcd.com/927/

I started to go back to oldschool - HTML tables.

People can hate it, but they work really almost flawlessly. I am not saying I use them for everything, but I totally changed my mind after I saw how flexbox and other things SUCK to no ends. So I now compare all of them to HTML tables. If they suck more than HTML tables, I discard them. This is my quality metric now. And a lot of this has to do with developers making these decisions, failing hard at DESIGN. What happened to simplicity? HTML tables are simple for the most part; they are kind of like a grid already.