Ayn Rand, misguided as she was, did not simply posit that 'greed is good' but it was that self-interest or selfishness was the highest and only moral behavior. That could mean a lot of things to different people. It could mean being greedy as it results in your self-aggrandizement. It could mean being altruistic if that is what you want to do. Regardless of what you do, you do it because YOU want to and not because you were told to do it by someone else.
Sadly, she also seemed to believe that people will perform at their best and that the brightest and best always won out. Even her protagonists would happily work for someone better than they if such a person existed. Rent-seeking or other greedy behaviors like patent-trolling are not likely very Rand-ian because they are not creators of anything and certainly are not doing their best at their job. They don't make (and get paid handsomely for it), they just take, as her antagonists do.
As to the notion that somehow, if the government had never gotten involved, we would be in a better place today, I think you may find yourself misguided as well. It seems quite the culture of the USA that we always want the most return for the least effort. That idea has given us such fun ideas as external cost to business. To maximize profits, I skip the cost of cleanup of my manufacturing process and instead dump waste back into the field. Is it toxic? Who cares, and when someone comes to tell me I need to clean it up, I'll cry bankrupt and move on with my money.
I have no high faith that, even if the government withdrew regulation in the best way possible (or even that hypothetical of never got involved in the first place) that we'd be any further ahead of where we are now. Comcast, in this case, doesn't want to provide the best service possible to all people possible. They're not being told they can't. Comcast is saying they don't want to be told what they have to do, even though they were only being told 'Wherever you see fit, run new lines.'