Google is a surveillance company with a huge impact on web standards thanks to its insane market share. Apple on its side uses its forced monopoly to prevent websites from competing with its app store. Gecko depends on Mozilla that depends on google for 90% of its revenue, and is today a good “look we’re not a monopoly” excuse for google.
I don’t think people want a new engine because the current ones don’t work. They want a new engine because they want the web to be truly open.