I agree, a lot of very large companies should be broken up.

At the same time, why can't someone's blog focus on one? Why can't a given company be held under the spotlight for something? Being asked to criticise all of them, or none of them seems like an unfair criticism. This post being about google doesn't preclude another one being written about all companies, or Facebook, or amazon, etc etc. Getting the ball rolling on even one of these companies would be a good start, so I don't see the harm in people writing posts focusing on one.

> and why do we see these posts frequently making it to top ten of hacker news?

Presumably because a lot of people agree with the proposition?