I wrote a couple of comprehensive take-downs of Ayn Rand's libertarianism that might interest you:

https://medium.com/discourse/the-sophistry-of-ayn-rands-case-for-ethical-selfishness-3f901f3f64f6?sk=62dc8a7b5284eeadf3d43a388417e2cc

https://medium.com/discourse/phony-humanism-and-ayn-rands-libertarian-mythos-b3c9b4eb515f?sk=edac1e388ca6734f9933f218832f4767