This is actually untrue. It's not illegal to become a monopoly. It's illegal to be anticompetitive once you have that market dominance.

Google may have achieved it's dominance legally, however, it's conduct since then is illegal.

> their market dominance is just evidence of the superior consumer value they provide.

I don't think that's true.

They leveraged their search engine dominance to push Chrome on people with banners stating that the user experience would be better on Chrome.

They bundled the Chrome installer with a load of other app installers and users would immediately find themselves with a new, default browser, because Google knew most users never explore advanced installer options to discover they needed to opt-out.

Google maps is far worse than OSM and HereMaps in my opinion, but it is far more pervasive because it is the go-to mapping service when users perform a search.

Do you run a website where those are significant traffic? It's been a long time since not-Google search has been more than a rounding error in my experience, with the exception of Yandex for Russia and Baidu for China if you have content for those audiences.

Vimeo and Firefox are trying but the trajectory has not been good.

You are... until gmail decides not to accept mail from your mailserver.