Google made a good browser and defaulted the search to their own engine. Then Google bought a mobile OS, bundled all the Google apps and services by default, and defaulted everything to their own browser with their own search engine. Google also paid Mozilla and Apple to default to Google search.
Google made good products and good services and aggressively defended them through acquisitions and paid placement deals. It may be your opinion that these acquisitions and placement deals are not "dirty" or "underhanded" but I find them to be fairly anticompetitive.