Well say she(or someone else) constantly keeps finding a better man than the previous one. Every few months on average a new, better person comes to their attention and they want them instead.
What about Ayn Rand? She was married to Frank O’Connor who supposedly wasnt a great intellectual. She pursued him initially based on his physical appearance. Then when Nathaniel Branden came along, she was having sex with him too. Theres a contradiction to her values in there somewhere. Possibly because Ayn Rand was having sex with Nathaniel Branden, who at the time was closer to Ayn Rands ideal man, and was also with Frank. Why was she with Frank if she wanted the “best” man?
Regarding finding a better every few months; without starting very very low on the “scale”, what do you think the chances of being able to do that are? Remember, I said significantly better. If you are focusing on some minor thing that’s better and using that for a reason to move on, then the problem is probably with your attention span. It needs to be a clear, better overall, kind of comparison. You can’t actually quantify people. Lisa is a 74 and suzi is a 76, therefore I must move on. It is a is clearly better then b in every significant way.
To continue with the Dagny example, she started with Francisco, and he left her. Not a choice she made. Then a decade later she found Hank who was a very productive man with some psychological inadequacies. The she found Galt. He was not a very productive man with a few less psychological issues. He was an incredibly productive man with very few, if any psychological problems. The jump was huge. Where could she go after that? Maybe a guy who is incredibly productive, saves the world, has no psychological problems, cooks an excellet creme brule, colonizes, the moon and then invents time travel, all without messing up his very great hair?
And, incidentally, finding someone better is not the only reason to leave someone. You should always be asking yourself if the persons influence on your life is good or bad overall.
I can’t answer for Ayn Rand, but from my distant and very outside point of view, I think what she did was wrong, and do not look to her life as an example of how best to handle ones love life. Her writings are a good deal more helpful.