What is your opinion regarding a husband who divorces his wife and exposes her secrets to his family while she is in intensive care after a dangerous surgery, because his mother refused the marriage of the divorced woman's brother to a girl from her father's family, knowing that the divorced woman's mother did not formally go to propose to the girl?

Divorce, merely because a previous marriage was not consummated, is reprehensible and may even reach thevel of prohibition. If he divulged his wife's secret, then a secret is a trust, and divulging it is a betrayal. A Muslim should entrust his affairs to Allah and be content with His decree and destiny, for Allah knows what is good for His servants, even if they dislike it, and what is bad for them, even if they love it.