Google (with others like Facebook, Apple) is so big, its essentially infrastructure, and needs to be regulated.

Maybe I'm out in left field here, but I thought that one of the hallmarks of infrastructure was a monopoly due to geographical concerns - it wouldn't make sense to run twelve different parallel power grids all over town. There is no such constraint here. Google, Facebook, etc are all big, but there's no lack of place to run power lines in play to stop a competitor from competing in their space (See DuckDuckGo, for example).