Google just happens to be the biggest among them, so it's understandable they come first, but this is going to happen for every entity that grows to a certain point because it's how our system works: small players crying mommy about big corporations killing competition until they grow to a point they can kill competition themselves, which they will happily do, becoming themselves the bad guys. Then some external entity comes and restores some balance by splitting them etc. Rinse, repeat.

Maximizing profits, which is the goal that moves every company everywhere, from small shops to multinational corporations, leads ultimately to this if no, sloppy, or deliberately inefficient control is performed.