Just because she lauded a certain, relatively elitist view, a view which is echoed to some degree in actual human endeavor, doesn't mean that she advocated some sort of nobility. Her heroes weren't people who were noble by birth or because they belonged to the right families. They were people who made things or ran enterprises (which incidentally is not a thing the Russian nobility was notable for!). In the end, the protagonists of her book had largely abandoned society and lost the fruits of the labors they had in greater society (gone on "strike").
Further, I find it odd that all you can seem to find in the book is some lame argument for Russian nobility. The most important takeaway is that this novel is about a dystopian future created by people who take from others and society supposedly for the purpose of saving society. The language she uses to describe them, particularly, "looter" indicates why she abhors the foes of the book. It's not because they aren't nobility.
She actually has some good writing in there particularly the story of the end of "20th Century Motors", a business which happened to employ John Galt as an inventor. The only people who could be considered nobility were the ones who inherited and then destroyed the company, causing a great deal of suffering in the process.
My entire point is Rand is pushing a view that the USA finally rejected in 1777 - so both ancient and silly.
Do you really think she would be so popular today, if you were even remotely right? The US is going through the early stages of the Atlas Shrugged nightmare right now. It's a country where higher education costs have tripled over a few short decades (adjusted for inflation) and this increase in cost is due solely to attempts to make college allegedly more affordable (subsidized and government guaranteed student loans). The same has happened for health care and home ownership.
It's a place where one can justify government spending by claiming that they will create one temporary job per few hundred thousand dollars spent. Where economic activity (GDP) is more important than future wealth. Where people can bitterly complain about the lack of jobs while simultaneously advocate for various policies that make it harder and more costly to employ people. Where moving enterprises to the more productive and vigorous societies of the world becomes synonymous with derogatory terms like "race to the bottom".
It's a place where various robin hood and social improvement policies have been in place for generations, yet things are getting worse and more corrupt with chilling signs of tyranny on the horizon. Where governments get creative with interpretation of laws in ways that suit them or their cronies.
Here's the thing. Rand nailed that 50 years ago: the language, the actions, the outcomes. I simply don't care if she actually had unpopular opinions on nobility or whatever. I think she should get considerable credit for calling our present society.