10-15 years ago cross-browser javascript and rendering compatibility was a nightmare for web developers and chromium was free, popular/winning, and legitimately very good so it made sense to standardize on it rather than independently develop inferior engines
but now that it monopolizes internet browsing of course it has started to bloat and suck. let a hundred browser engines bloom
also i would argue that not enough was done to oppose scope creep in web standards. i don't agree that your web browser should be a platform for complicated applications that do more than deliver content and receive posts. even flash was a bridge too far.