Since you added a line to put sources below, let me take a moment to be a man of my word. First, this one's not a primary source, but does a great job outlining the challenges faced by any regulatory agency trying to bring a case against a big tech firm: https://www.washingtonpost.com/business/2020/07/30/antitrust-amazon-apple-facebook-google/ And second, since I know you're not going to like that first one, here is a wildly detailed explanation of the possible antitrust routes the government can take, and the issues with each, including extremely detailed primary sources and relevant case law: https://fas.org/sgp/crs/misc/R45910.pdf Page 20 is where it gets into the specific charges that are levied against Google right now. You'll notice that it doesn't say "Google isn't a monopoly", it says that because of technicalities in how the laws are written and how precedent has been set in the last few decades, any prosecutor faces an uphill battle in proving that existing laws and precedent apply in the case of the big technology companies.