Google are a company who have a product (search, among many). Their product is successful (many people use search). Competitors obviously find it hard to break into the market, and want to make that easier. Is this not how business works? A company creates a product and tries to make it as popular and widely used as possible? Also, is Google not at liberty to decide how it ranks search results? Surely if they want to hide results from competitors they are allow to do that?
If my company made car tyres, and 90% of car owners in Europe used my tyres, I'd find it absolutely ludicrous if my competitors tried to break up my company because its "unfair" that I have the market share.
Google has the market share for search, whether its "unfair" or not. Competitors should work hard to push them off with their own products, not by trying to break up the organisation. Seems somewhat petty to me.
There are other arguments which are valid such as:
> How Google copies content from other websites - such as restaurant reviews - to include within its own services
Disclaimer: I don't use Google products.