The government is absolutely granting Google a monopoly today. They own the browser, your email, and search. If antitrust had any teeth in this era the company would have been nuked a decade ago if not even sooner.
Don’t get me wrong, antitrust is good! Government intervention is necessary. But lasseiz-fares does not mean what you appear to think it means.
That is substantively different from a government granted monopoly, wherein it is illegal to create a competing business.
The point is that monopolies are a natural market outcome, and are what created Google. Does Google continue to exist as it is because the government has chosen not to do anything? Yes. Welcome to the free market.