Hank was twisted by society before he met his wife.
Remember, someone as driven and brilliant as a Hank Rearden would be looked down upon by his “social betters,” which his family considered themselves part of, even though Hank’s wealth is what enabled his family to join that society.
Hank Rearden gave his word, in marriage, to a woman who didn’t appreciate his efforts. His character is such that he follows through on his commitment, even though his wife and family are unworthy of it.
I still haven’t figured out what Hanks social rank was prior to him “making it” .