"Undermining" is a broad term not specifying how. Galt didn't destroy private property, he withdrew support by persuading the best minds to stop helping their own destruction. Even Ragnar targeted only looters.

The theme of the novel was the role of the mind in human life, illustrated by showing what happens when it is withdrawn. To show that in the accelerated, fictional plot, Galt deliberately set out to bring down the corrupt society through the best minds not helping it, getting the evil mindlessness out of the way by collapsing its coercive power, so that the rational could produce and live.

That isn't practical or even possible in reality as a means, and Ayn Rand did not advocate it. As a tactic "strikers" would barely be noticed if at all, and to the extent it had an effect it would only make things worse -- much worse if the economy and political system were to actually collapse. It is not a way to a better world; without the required general acceptance of the proper philosophic principles employed for guiding actions nothing would change for the better in any kind of recovery.

But in the novel and in reality people should, and do, as individuals refuse to work for their own punishment, which is a different motive, and Ayn Rand did support that, rejecting sacrifice by individuals.

The question is always how much injustice to tolerate in any particular activity, and what else is possible in some other kind of job or career and in what location. Holing up in the wilderness as a way of life is not practical, and neither is an attempt at a secret utopian society.

This is John's one act of altruism. Although, it is also a service from which he will likely profit.

If something you are doing is not of actual service to anyone, how does that make you a profit? It don't. Making money is the surest sign that you are doing good. NB: Making Money. Not looting or mooching to acquire it.

The balance between altruism for those he values and his attention to his own benefit runs throughout.

Me dino is a conserving conservative. I'm more into restoring than destroying.
Nevertheless, I would strive to undermine and hasten the end of a successful Marxist takeover inflicted by the Antifa and BLM extensions of the Jackass wannabe commie Demonrat Party.

He was hastening the end, but I doubt he'd lead an anti-thought, anti-freedom socialist movement to make it happen today. That bunch would be anathema to him, like backing Biden for President to meet his goals. The mere thought of someone like JG using those methods makes me sick. He wouldn't stop them because the chaos they create will move things along, but to actively work with them, no. Dan Conway gave up to have his last few years in bitter peace (there's a near oxymoron for you). I can't imagine you retiring that way, jb.

1100 pages is miniscule in the course of a civilzation, but every one of those pages represented volumes of thought.

It took 1100 pages to present the plot. The plot itself was described as taking place over only a few years, not counting flashbacks. Even with the flashbacks for the major characters, encompassing about a generation, the events in that time span were an artificial acceleration of actions leading to a collapse due to withdrawing key individuals and those dropping out on their own.

I hope your company succeeds and then continues to thrive. The great advances in technology have been in spite of the political and other irrational trends.