I can understand the hatred many people here have toward Google, Facebook or other big gigantic life-controlling entities.
The step to remove Google dominance is to find, create and nurture alternatives. For example, I started using Fastmail. I'm using some of Apple products like the Calendar and Notes. I'm using Skype for communication.
So I'm diversifying a bit though they can engage in data sharing. This reduces the monopoly power of one single entity.
Blocking Google, Facebook or another big provider will not work and if it did, it can have severe consequences. Most people (and politicians) are ignoring the massive productivity benefits that Google search is bringing. It can be used for evil, but the productivity it brings is paramount.
You can't fight Google by blocking it or destroying it. There is a reason that Google is huge: It is magical and there is no usable alternative.
To remove Google monopoly you did what Google did for Yahoo or Bing: You build an alternative. It is possible to have multiple alternatives for search like for email or smartphones (though we have only two).
The reason we don't? Google won. Android/iOS won. Linux/Windows won. Everybody gave up and just accepted it. Now everyone is screaming of "regulating" these guys. Trust me. This how you get closer to your demise (politicians and current day governments) than to their demise.