The post was overly dramatic and mostly sarcastic, but not entirely. My point is that we are under the illusory impression that our opinions matter. If you are like 95% percent of the population who don't have a significant amount of capital (whether political, social or economic) then what you think is largely irrelevant and it's delusional to think the contrary.
As you said, the world usually ends "just as lousy" as before when things change. By lousy I mean that there will be a strict hierarchy of a few unimaginably powerful people exercising their will over the rest. Whether it's in a libertarian's wet dream or in the most claustrophobic dictatorial society, this will always be true. The average standard of living improves over time but the distribution remains the same. It's inevitable.
Let's say you hate Facebook and its privacy violations. What can you do about it? Nothing at all. You may try to stage protests or send angrily worded letters to your representative, but at the end of the day, to people like Zuckerberg you will be the equivalent of a pesky bug, soon squished and forgotten. So go ahead and impress me! Change the world. You might think, "What about those people who didn't give up their dreams and changed history in the process?" Well, unless you are lucky enough to be in the right place at the right time and armed with the right idea, it's extremely unlikely that you will have any impact at all on the world; hard work will never be enough. I want to change society as well, and I am constantly on the lookout for an opportunity to do so, but I also try to keep my expectations grounded in reality. I know I am not a protagonist according to whose life the story of the species evolves. It's highly possible, though not certain, that my life will be insignificant. I keep hoping it won't, but life isn't fiction and there are limits. I keep the glimmer of hope alive but I am fully aware that it emits only a pale light.
tl;dr Stop being outraged about the hypocrisy of powerful people and don't convince yourself that you have the moral high ground; you will only hurt yourself. Might makes right.