Google got to be the top from changing their business model, the competitors just failed to innovate in time. Thus lots of email users from hotmail, yahoo and other competitors went to Google. Likewise for Google Maps. I see nothing evil about that, sure their privacy things are scary but it's what you exchange for the service. Like how if you work for the U.S. government you give up some of your privacy in return for the job.

If Google ever becomes the bad monpolist then all that will happen is the U.S. government will step in as long as people are pissed off enough about it.