Because things were much worse in the beforetime

I am blisteringly angry about CSS in general AND THIS FUCKING ISSUE IN PARTICULAR since 2005 at the very latest. Likely enough to up the average for several thousand people with only mild dislike for CSS.

If CSS had a church I would burn it down. In minecraft of course.

I would say because a) there are zero alternatives, and b) it's pretty powerful; you can generally do pretty much any layout even if it requires hacks, c) switching to something else is clearly infeasible so it's not worth even asking for.

Just have to live with it (on the web at least).

What we were promised:

Content in one HTML document.

Styles in other CSS, able to apply any to completely alter the layout of the document.

What we got:

<div class="mt mid flex lt-8 no-margin up-1">

It good

CSS 3 is solid, mate. You can do just about anything with it if you know what you're doing.

BaCkWaRdS cOmPaTiBiLiTy 😵‍💫

Compared to what? JS? (/joke)

It's js being the problem in frontend development, not css