If web was as good as iOS native, for example, Apple wouldn’t get their cut.
What does that mean as related to 'competition in the browser space' ?
Apple has a browser. Apple sits on the CSS steering committee.
The assertion is that the major browser owners (Apple, Microsoft, Google, Mozilla) don't want competition, so they keep CSS complicated.
All four of these companies are members of the CSS Working Group. So the ability to do this is within their power.