Not sure if this is going to make a strong case in the court at least in the current legal framework. For many cases, competition is a click away; Search is straightforward, and for Ads it's merely a matter of budget allocation (thanks to FB and Amazon, there's some real competitions). To prove that this is objectively harmful to consumers, a lot more works would be required for DoJ. I don't see any good arguments in the filing other than ambiguous "reducing consumer choices, stifling innovation". Now I can understand why lawyers were concerned with this half-baked accusation in a NYT article.
Probably legislation approaches proposed by Democrats is a right way to handle this case. I'm afraid that this immature lawsuit may give Google and other tech giants political exemptions to the future antitrust regulations potentially enabled by the reformed bill. Maybe Biden administration will decide to just drop it in favor of reforming the bill?
Note that having a functional monopoly through simply being popular is not illegal, it's practices which unfairly protect or exploit that market power that can be illegal.
The article goes into some candidates for activities that might be judged abuses, such as buying the default search slot on iPhones. Another might be unfairly promoting Google properties, and artificially burying competitors in search results. Another area that might be looked at is Google providing various free services such as Gmail and Google Docs, essentially subsidised by search revenue, in order to squeeze out competitors from possible revenue streams.
Having said that, this is mostly a shakedown. If Google would just set up a PAC and cough up I'm sure this will all just go away.
Probably legislation approaches proposed by Democrats is a right way to handle this case. I'm afraid that this immature lawsuit may give Google and other tech giants political exemptions to the future antitrust regulations potentially enabled by the reformed bill. Maybe Biden administration will decide to just drop it in favor of reforming the bill?